Question 961827
"calculate the area of a disc inscribed in a square with a perimeter of 72 cm"
:
Draw a circle inside a square and it will be apparent that the diameter of the circle is equal the side of the square, when we know the diameter, we know the radius and can easily find the area of the circle
:
Find the side of the square: 72/4 = 18 cm, also the diameter, r = 9
Find the area of the circle: 
A = {{{pi*9^2}}}