# 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
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
 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
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!