Question

HELP ME PESSE WILL DO ANYTHING

Answer 1

12.4cm

Explanation:

Circumference of a circle:
`\pi d` where d is the diameter.

Therefore circumference of a quarter circle (just the arc):
`(1)/(4) \pi d`

Arc AB =
`(1)/(4) *\pi * (2*7.9)` since Diameter = 2 times of Radius

Arc AB =
`(1)/(4)*3.14*15.8` = 12.4cm (rounded to the nearest tenth)