Question

(v) The angular measure of an arc of a circle of radius 21 cm
is 150°. Find the length of that arc.​

Answer 1

Answer:

• 55 cm

Step-by-step explanation:

Given

• Angular measure of an arc of a circle (radius) = 21 cm
• Angle of sector = 150°

To find

• Length of the arc

Solution

We have :-

• r = 21 cm
• θ = 150°

We shall find length of arc using the formula :-

• (θ / 360) ×2πr
• (150 / 360) × 2 × 22/7 × 21
• (15 / 36) × 44/7 × 21
• (15/36) × 132
• 55

Hence, the length of arc is 55 cm.

Answer 2

Answer:

(θ / 360) ×2πr

(150 / 360) × 2 × 22/7 × 21

(15 / 36) × 44/7 × 21

(15/36) × 132

55

Step-by-step explanation: