# Chapter 5: Mensuration Arc Length, Sector Area & Radian Measure - Math Mcqs for Grade 8 - Set 1

1)   If the arc of circle of radius 30 cm has a length of 19 cm then the angle subtended at center of circle is

a. 51.28
b. 16.28
c. 46.28
d. 36.28
 Answer  Explanation ANSWER: 36.28 Explanation: No explanation is available for this question!

2)   The formula used to measure circumference of circle is

a. 2πr
b. πr² + 2r
c. πr²
d. πr²
 Answer  Explanation ANSWER: 2πr Explanation: No explanation is available for this question!

3)   The quarter of the circle is

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

4)   In the formula 2πr, the 'r' is considered as

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

5)   Considering radian, the value of tan 1.1 is

a. 1.964
b. 0.857
c. 0.382
d. 0.457
 Answer  Explanation ANSWER: 1.964 Explanation: No explanation is available for this question!

6)   If the radius is 18 cm and the angle at center of circle is 120° then the area of sector is

a. 382.4 cm²
b. 339.3 cm²
c. 350 cm²
d. 300 cm²
 Answer  Explanation ANSWER: 339.3 cm² Explanation: No explanation is available for this question!

7)   The largest part of the circle divided by the chord is called

a. circumference
b. quadrant
c. minor segment
d. major segment
 Answer  Explanation ANSWER: major segment Explanation: No explanation is available for this question!

8)   The chord divides the circle into

a. two segments
b. three segments
c. four segments
d. five segments
 Answer  Explanation ANSWER: two segments Explanation: No explanation is available for this question!

9)   The value of tan π⁄7 considering radian is

a. 0.357
b. 0.768
c. 0.481
d. 0.274
 Answer  Explanation ANSWER: 0.481 Explanation: No explanation is available for this question!

10)   If the circumference of circle is 64π then the area of circle (in terms of π) is

a. 664 cm²
b. 1024π cm²
c. 1050π cm²
d. 512π cm²
 Answer  Explanation ANSWER: 1024π cm² Explanation: No explanation is available for this question!