What is the length of the area that subtends an angle of 72degree at the centre of a circle of radius 5cm
Answers
Answered by
0
2(Circle ×radius)
2 (72×5)
2 (360)
720
Answered by
0
Typo: 'arc' not 'area'.
Solution:
We have,
angle = 72°
radius of circle (r) = 5cm
Then by formula,
length of arc = angle/360° × 2 × pi × r
= 72°/360° × 2 × (22/7) × 5 cm
= 0.2 × 220/7 cm
= 44/7 cm
= 6.2857142857 cm
= 6.3 cm
Therefore length of arc is 6.3 cm
Solution:
We have,
angle = 72°
radius of circle (r) = 5cm
Then by formula,
length of arc = angle/360° × 2 × pi × r
= 72°/360° × 2 × (22/7) × 5 cm
= 0.2 × 220/7 cm
= 44/7 cm
= 6.2857142857 cm
= 6.3 cm
Therefore length of arc is 6.3 cm
Similar questions