Please help for one easy geometry question. PLEASE

Question

asked Sep 20, 2020 218k views

1 Answer

Neam · Answer 1 · 2020-09-24T09:16:10+0000

Answer:

40pi

Explanation:

Area of a circle:
$A = \pi r^2$

Shaded area: 2*72° = 144°, which is 0,4 of the total area. (144°/360° = 0,4)

r = 10, according to your picture

->
$A = \pi \cdot 10^2 \cdot 0,4 = 40 \pi$