Question

Find the length of arc AD. Use 3.14 for .

Round to the nearest tenth.
7.9 cm
B
66.4
C
[ ? ]cm
Enter

Answer 1

12.4

Explanation:

Just did it.

Answer 2

Length of arc AD = 15.7 cm

Explanation:

Length of arc =
`(\theta)/(360)(2\pi r)`

Here, θ = Central angle subtended by the arc

r = radius of the circle

From the picture attached,

Central angle subtended by arc AD = 360° - (180° + 66.4°)

= 113.6°

Length of arc AD =
`((113.6))/(360)(2\pi )(7.9)`

=
`(113.6)/(360)(2)(3.14)(7.9)`

= 15.655 cm

≈ 15.7 cm

Length of arc AD = 15.7 cm