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Please help me solve this one.
Thank u!

Please help me solve this one. Thank u!-example-1

1 Answer

6 votes

Answer:

20 cm²

Explanation:

It is a right triangle.

So, using Pythagorean theorem: OS² = OR² - RS²

OR = r (radius) + 8

OS = r

RS = 16

=> r² = (r+8)² - 16²

r² = r² + 16r + 64 - 256

r² = r² + 16r - 192

16r = 192

r = 192 / 16 = 12cm²

a) 12 cm²

b) 12 + 8 = 20 cm²

User Mark Loyman
by
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