Question

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Answer 1

Area of semicircle:

A = 1/2πr²
A = 1/2π(10)²
A = 1/2(100π)
A = 157.0796327


Area of square:

A = s²√3 / 4
A =10²√3 / 4
A = 43.30127019


Area of Shaded region = Area of semicircle + area of square
= 157.07~~ + 43.30..
= 200.38 cm² approximately

Answer 2

correct..

Answer 3

AB is the diameter of the half-circle. The radius is ½ of AB

Also, I do not see a square. I see an equilateral triangle, with sides all equal to 10

Answer 4

i mean.. triangle.. wrong word.

Answer 5

@phi my answer isn't correct for you?

Answer 6

oh right

Answer 7

I'll just replace all radius with 5.. and everything will be correct right?

Answer 8

yes, you have the right idea... but the radius is 5 (not 10). The area of the triangle is ok.

Answer 9

thank you so much :)