# Chapter 5: Mensuration Arc Length, Sector Area & Radian Measure - Math Mcqs for Grade 8 - Set 3

1)   The line segment which joins distinct points on circumference is called

a. radius
b. chord
c. perimeter
d. length
 Answer  Explanation ANSWER: chord Explanation: No explanation is available for this question!

2)   If the circumference of circle is 82π then the value of 'r' is

a. 41 cm
b. 82 cm
c. 27.34 cm
d. 20 cm
 Answer  Explanation ANSWER: 41 cm Explanation: No explanation is available for this question!

3)   The new unit to express magnitude of angle is called

a. cosine
b. radian
c. circumference
d. area
 Answer  Explanation ANSWER: radian Explanation: No explanation is available for this question!

4)   The value of sin 2π⁄3 considering radian is

a. 1.578
b. 0.624
c. 0.574
d. 0.866
 Answer  Explanation ANSWER: 0.866 Explanation: No explanation is available for this question!

5)   By converting angle from degrees to the radians, the 105° is equal to

a. 2.856 rad
b. 3.523 rad
c. 0.348 rad
d. 1.832 rad
 Answer  Explanation ANSWER: 1.832 rad Explanation: No explanation is available for this question!

6)   The sector at center of circle having an angle of 90° is called

a. quadrant
b. major sector
c. minor sector
d. semi-chord
 Answer  Explanation ANSWER: quadrant Explanation: No explanation is available for this question!

7)   If the sector of circle of radius 16 cm has an area of 140 cm² then the angle subtended at center of circle is

a. 62.66°
b. 70°
c. 75°
d. 58.66°
 Answer  Explanation ANSWER: 62.66° Explanation: No explanation is available for this question!

8)   By converting 3.5rad into degrees, the answer will be

a. 103.12°
b. 95°
c. 180°
d. 140.12°
 Answer  Explanation ANSWER: 103.12° Explanation: No explanation is available for this question!

9)   The angles in opposite segments are classified as

a. acute
b. supplementary
c. complementary
d. obtuse
 Answer  Explanation ANSWER: supplementary Explanation: No explanation is available for this question!

10)   The sector at center of circle having an angle of 180° is called

a. semicircle
b. minor arc
c. major-chord
d. major arc
 Answer  Explanation ANSWER: semicircle Explanation: No explanation is available for this question!

11)   Considering radian, the value of sin 1.9 is

a. 0.386
b. 0.258
c. 0.946
d. 2.876
 Answer  Explanation ANSWER: 0.946 Explanation: No explanation is available for this question!