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!