Geometry and Trigonometry MCQ Quiz - Objective Question with Answer for Geometry and Trigonometry - Download Free PDF

Last updated on Mar 23, 2025

Latest Geometry and Trigonometry MCQ Objective Questions

Geometry and Trigonometry Question 1:

In triangle XYZ, angle X is 45\degree, and triangle XYZ is similar to triangle PQR. What is the measure of angle P?

  1. 90\degree
  2. 60\degree
  3. 45\degree
  4. 75\degree

Answer (Detailed Solution Below)

Option 3 : 45\degree

Geometry and Trigonometry Question 1 Detailed Solution

Similar triangles have congruent corresponding angles. Therefore, if angle X in XYZ is 45\degree, angle P in PQR must also be 45\degree. Option 3 is the correct choice. The other options represent incorrect angles that don't satisfy the property of similar triangles.

Geometry and Trigonometry Question 2:

A triangle has sides of length 5, 12, and a hypotenuse. What is the length of the hypotenuse?

  1. 10
  2. 13
  3. 14
  4. 15

Answer (Detailed Solution Below)

Option 2 : 13

Geometry and Trigonometry Question 2 Detailed Solution

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. Given sides of 5 and 12, we calculate: 52+122=25+144=169. The hypotenuse is the square root of 169, which is 13. Therefore, the length of the hypotenuse is 13. Options 10, 14, and 15 are incorrect as they do not satisfy a2+b2=c2 for the given side lengths.

Geometry and Trigonometry Question 3:

In an isosceles right triangle, the hypotenuse measures 102 centimeters. What is the length of each leg of the triangle?

  1. 5 cm
  2. 10 cm
  3. 102 cm
  4. 20 cm

Answer (Detailed Solution Below)

Option 2 : 10 cm

Geometry and Trigonometry Question 3 Detailed Solution

In an isosceles right triangle, the two legs are equal in length and the angles opposite these legs are each 45. By the Pythagorean theorem, if each leg is x, then the hypotenuse is x2. Given that the hypotenuse is 102, we set x2=102. Solving for x, we find that x=10. Therefore, each leg of the triangle measures 10 cm.

Geometry and Trigonometry Question 4:

Two similar triangles KLM and NOP have K=N and M=P as right angles. If tanL=3 and NP=80, what is the length of NO?

  1. 160
  2. 803
  3. 1603
  4. 80

Answer (Detailed Solution Below)

Option 1 : 160

Geometry and Trigonometry Question 4 Detailed Solution

In KLMNOP, K=N and M=P are right angles, so tanL=tanO=3. This gives OPNP=3. With NP=80, OP=803. For a 30-60-90 triangle, the hypotenuse NO is twice the length of the shorter leg, so NO=2×80=160. Hence, the correct answer is 160.

Geometry and Trigonometry Question 5:

A circular track is designed for a jogging path. If a jogger runs along an arc measuring 5π12 radians, what is the measure of this arc in degrees?

  1. 60
  2. 75
  3. 80
  4. 90

Answer (Detailed Solution Below)

Option 2 : 75

Geometry and Trigonometry Question 5 Detailed Solution

To convert 5π12 radians to degrees, multiply by 180π:

5π12×180π=5×18012=75 degrees.

Therefore, the arc measures 75 degrees.

Top Geometry and Trigonometry MCQ Objective Questions

A triangular prism has a height of 8 centimeters (cm) and a volume of 216 cm3. What is the area, in cm2, of the base of the prism? (The volume of a triangular prism is equal to Bh, where B is the area of the base and h is the height of the prism.)

Answer (Detailed Solution Below) 27 - 29

Geometry and Trigonometry Question 6 Detailed Solution

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The correct answer is 27.

It's given that a triangular prism has a volume of 216 cubic centimeters (cm3) and the volume of a triangular prism is equal to Bh, where B is the area of the base and h is the height of the prism.
Therefore, 216 = Bh. It's also given that the triangular prism has a height of 8 cm.
Therefore, h = 8.
Substituting 8 for h in the equation 216 = Bh yields 216 = B(8).
Dividing both sides of this equation by 8 yields 27 = B.
Therefore, the area, in cm2, of the base of the prism is 27 .

The volume of right circular cylinder A is 22 cubic centimeters. What is the volume, in cubic centimeters, of a right circular cylinder with twice the radius and half the height of cylinder A?

A. 11

B. 22

C. 44

D. 66

  1. 1
  2. 2
  3. 3
  4. 4

Answer (Detailed Solution Below)

Option 3 : 3

Geometry and Trigonometry Question 7 Detailed Solution

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Choice C is correct. The volume of right circular cylinder A is given by the expression πr2h, where r is the radius of its circular base and h is its height. The volume of a cylinder with twice the radius and half the height of cylinder A is given by π(2r)2(12)h, which is equivalent to 4πr2(12)h=2πr2h. Therefore, the volume is twice the volume of cylinder A , or 2 × 22 = 44.

Choice A is incorrect and likely results from not multiplying the radius of cylinder A by 2. Choice B is incorrect and likely results from not squaring the 2 in 2 r when applying the volume formula. Choice D is incorrect and likely results from a conceptual error. 

A circle has a circumference of 31π centimeters. What is the diameter, in centimeters, of the circle?

Answer (Detailed Solution Below) 31 - 33

Geometry and Trigonometry Question 8 Detailed Solution

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The correct answer is 31.
The circumference of a circle is equal to 2πr centimeters, where r represents the radius, in centimeters, of the circle, and the diameter of the circle is equal to 2r centimeters.
It's given that a circle has a circumference of 31π centimeters.
Therefore, 31π = 2πr.
Dividing both sides of this equation by π yields 31 = 2r.
Since the diameter of the circle is equal to 2r centimeters, it follows that the diameter, in centimeters, of the circle is 31.

A right circular cone has a height of 22 centimeters (cm) and a base with a diameter of 6 cm. The volume of this cone is nπ cm3. What is the value of n ? 

Answer (Detailed Solution Below) 66

Geometry and Trigonometry Question 9 Detailed Solution

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The correct answer is 66. It's given that the right circular cone has a height of 22 centimeters (cm) and a base with a diameter of 6 cm. Since the diameter of the base of the cone is 6 cm, the radius of the base is 3 cm. The volume V, in cm3, of a right circular cone can be found using the formula V=13πr2h, where h is the height, in cm, and r is the radius, in cm , of the base of the cone. Substituting 22 for h and 3 for r in this formula yields V=13π(3)2(22), or V = 66 π. Therefore, the volume of the cone is 66π cm3. It's given that the volume of the cone is nπ cm3. Therefore, the value of n is 66.

A triangle with angle measures 30°, 60°, and 90° has a perimeter of 18+63. What is the length of the longest side of the triangle?

Answer (Detailed Solution Below) 12

Geometry and Trigonometry Question 10 Detailed Solution

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The correct answer is 12. It is given that the triangle has angle measures of 30°, 60°, and 90°, and so the triangle is a special right triangle. The side measures of this type of special triangle are in the ratio 2:1:3. If x is the measure of the shortest leg, then the measure of the other leg is 3x and the measure of the hypotenuse is 2x. The perimeter of the triangle is given to be 18+63, and so the equation for the perimeter can be written as 2x+x+3x=18+63. Combining like terms and factoring out a common factor of x on the left-hand side of the equation gives (3+3)x=18+63. Rewriting the right-hand side of the equation by factoring out 6 gives (3+3)x=6(3+3). Dividing both sides of the equation by the common factor (3+3) gives x = 6. The longest side of the right triangle, the hypotenuse, has a length of 2x , or 2(6), which is 12.

qImage66f3bbd3d8f217c18a946675

In the figure above, BD is parallel to AE.

What is the length of CE ?

Answer (Detailed Solution Below) 30

Geometry and Trigonometry Question 11 Detailed Solution

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The correct answer is 30. In the figure given, since BD is parallel to AE and both segments are intersected by CE, then angle BDC and angle AEC are corresponding angles and therefore congruent. Angle BCD and angle ACE are also congruent because they are the same angle. Triangle BCD and triangle ACE are similar because if two angles of one triangle are congruent to two angles of another triangle, the triangles are similar. Since triangle BCD and triangle ACE are similar, their corresponding sides are proportional. So in triangle BCD and triangle ACE, BD corresponds to AE and CD corresponds to CE. Therefore, BDCD=AECE. Since triangle BCD is a right triangle, the Pythagorean theorem can be used to give the value of CD : 6+ 8= CD2. Taking the square root of each side gives CD = 10. Substituting the values in the proportion BDCD=AECE yields 610=18CE. Multiplying each side by CE, and then multiplying by 106 yields CE = 30. Therefore, the length of CE is 30.

Triangle ABC is similar to triangle DEF, where angle A corresponds to angle D and angle C corresponds to angle F. Angles C and F are right angles. If tan(A)=507, what is the value of tan(E) ?

Answer (Detailed Solution Below) 14

Geometry and Trigonometry Question 12 Detailed Solution

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The correct answer is 750. It's given that triangle ABC is similar to triangle DEF, where angle A corresponds to angle D and angle C corresponds to angle F. In similar triangles, the tangents of corresponding angles are equal. Since angle A and angle D are corresponding angles, if tan(A)=507, then tan(D)=507. It's also given that angles C and F are right angles. It follows that triangle DEF is a right triangle with acute angles D and E. The tangent of one acute angle in a right triangle is the inverse of the tangent of the other acute angle in the triangle. Therefore, tan(E)=1tan(D). Substituting 507 for tan(D) in this equation yields tan(E)=1507, or tan(E)=750. Thus, if tan(A)=507, the value of tan(E) is 750. Note that 7/50 and .14 are examples of ways to enter a correct answer.

In a right triangle, the tangent of one of the two acute angles is 33. What is the tangent of the other acute angle?

A. 33

B. 33

C. 33

D. 33

  1. 1
  2. 2
  3. 3
  4. 4

Answer (Detailed Solution Below)

Option 4 : 4

Geometry and Trigonometry Question 13 Detailed Solution

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Choice D is correct. The tangent of a nonright angle in a right triangle is defined as the ratio of the length of the leg opposite the angle to the length of the leg adjacent to the angle. Using that definition for tangent, in a right triangle with legs that have lengths a and b, the tangent of one acute angle is ab and the tangent for the other acute angle is ba. It follows that the tangents of the acute angles in a right triangle are reciprocals of each other. Therefore, the tangent of the other acute angle in the given triangle is the reciprocal of 33 or 33.

Choice A is incorrect and may result from assuming that the tangent of the other acute angle is the negative of the tangent of the angle described. Choice B is incorrect and may result from assuming that the tangent of the other acute angle is the negative of the reciprocal of the tangent of the angle described. Choice C is incorrect and may result from interpreting the tangent of the other acute angle as equal to the tangent of the angle described.

Triangle ABC is similar to triangle DEF, where angle A corresponds to angle D and angles C and F are right angles. The length of AB is 2.9 times the length of DE. If tanA=2120, what is the value of sin D ?

Answer (Detailed Solution Below) 7241

Geometry and Trigonometry Question 14 Detailed Solution

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The correct answer is 2129. It's given that triangle ABC is similar to triangle DEF, where angle A corresponds to angle D and angles C and F are right angles. In similar triangles, the tangents of corresponding angles are equal. Therefore, if tanA=2120, then tanD=2120. In a right triangle, the tangent of an acute angle is the ratio of the length of the leg opposite the angle to the length of the leg adjacent to the angle. Therefore, in triangle DEF, if tanD=2120, the ratio of the length of EF to the length of DF is 2120. If the lengths of EF and DF are 21 and 20, respectively, then the ratio of the length of EF to the length of 20DF is 2120. In a right triangle, the sine of an acute angle is the ratio of the length of the leg opposite the angle to the length of the hypotenuse. Therefore, the value of sin D is the ratio of the length of EF to the length of DE. The length of DE can be calculated using the Pythagorean theorem, which states that if the lengths of the legs of a right triangle are a and b and the length of the hypotenuse is c, then a+ b= c2. Therefore, if the lengths of EF and DF are 21 and 20, respectively, then (21)+ (20)= (DE)2, or 841 = (DE)2. Taking the positive square root of both sides of this equation yields 29 = DE. Therefore, if the lengths of EF and DF are 21 and 20, respectively, then the length of DE is 29 and the ratio of the length of EF to the length of DE is 2129. Thus, if tanA=2120, the value of sin D is 2129. Note that 21/29, .7241, and 0.724 are examples of ways to enter a correct answer.

The length of a rectangle's diagonal is 317, and the length of the rectangle's shorter side is 3. What is the length of the rectangle's longer side?

Answer (Detailed Solution Below) 12

Geometry and Trigonometry Question 15 Detailed Solution

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The correct answer is 12. The diagonal of a rectangle forms a right triangle, where the shorter side and the longer side of the rectangle are the legs of the triangle and the diagonal of the rectangle is the hypotenuse of the triangle. It's given that the length of the rectangle's diagonal is 317 and the length of the rectangle's shorter side is 3. Thus, the length of the hypotenuse of the right triangle formed by the diagonal is 317 and the length of one of the legs is 3. By the Pythagorean theorem, if a right triangle has a hypotenuse with length c and legs with lengths a and b, then a+ b= c2. Substituting 317 for c and 3 for b in this equation yields a+ (3)= (317)2, or a+ 9 = 153. Subtracting 9 from both sides of this equation yields a= 144. Taking the square root of both sides of this equation yields a=±144, or a =  ±12. Since a represents a length, which must be positive, the value of a is 12 . Thus, the length of the rectangle's longer side is 12.
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