The diagram below shows a rectangular sheet of cardboard with 2 circular

pieces cut from it. The radius of each of the circular pieces is 3cm. Find the

area of remaining card.

pieces cut from it. The radius of each of the circular pieces is 3cm. Find the

area of remaining card.

Answer:

Two sector of 90 degree cut out(90*2=180 degree) means semicircle

perimeter of circle= 2πr

= 2*22/7*3=18.85 cm

perimeter of semicircle=18.85/2=9.42 cm approx

2 =

3cm =

Explanation – solve the function operation