Question

If the radius of A is units, and if triangle DGH and triangle DFE are isosceles right triangles with ED =DF=3 and DH=DG=6, approximate the area of the shaded region. (use pi=3.14)....
Choices:
A. 22.5
B.101
C.78.5
D.56

Answer 1

Hint:


Area of a Circle:

A = pi*r^2

r = radius

-----------------------------

Area of an Equilateral Triangle

A = s^2*sqrt(3)/4

s = side length of the triangle

Answer 2

I ended up with 56

Answer 3

@jim_thompson5910

Answer 4

what's the radius

Answer 5

that bit of info is missing

Answer 6

The area of circle A = 25π
The area of ∆DFE = ½*3*3 = 9/2
The area of ∆DGH = ½*6*6 = 18
The shaded region is the area of the circle less the areas of the two triangles = 25π - 9/2 -18 = 56.04..... right?

Answer 7

you're using the wrong formula to find the areas of the triangles

Answer 8

use the formula I gave you