Do the area of the circle as a whole minus (72/360 x radius^2) and then minus the other grey area.
Answer:
4.12
Step-by-step explanation:
A^2+b^2=c^2 so 8^2+b^2=9^2 so 64+b^2=81 so b^2=17 so b=4.12
Hypotenuse by Pythagoras theorem = 407.83.
Hi there, just multiply all 4 numbers. 5.3*8*8*4=1356.8
