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jamiecoolgal8697
21.03.2021 •
Mathematics
Find the area of the shaded region
(the number is 8 for anyone not able to read it)
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Ответ:
≈ 18.3 m²
Step-by-step explanation:
The shaded area (A) is calculated as
A = area of sector - area of right triangle
area of sector = area of circle × fraction of circle
A = πr² ×![\frac{90}{360}](/tpl/images/2239/8403/16d49.png)
= π × 8² ×
= 64π ×
= 16π m²
area of triangle =
× 8 × 8 = 4 × 8 = 32 m²
shaded area is then
A = 16π - 32 ≈ 18.3 m² ( to the nearest tenth )
Ответ: