Question

find the area of the shaded region using Pi is equal to 3.14 the side is equal to 12m and the length is 5m of a rectangle in a circle​

Answer 1

since you haven't add the diagram of problem iam assuming that you're asking about region left out from rectangle

since diagonal of rectangle will be circle's diameter  hence

r=1/2 of diagonal

diagonal=√12²+5²=13m

radius = 13/2

area =πr²=3.14*(13/2)²=132.6m²

area of rectangle =12*5=60m²

area of shaded region =(132.6-60)m²=72.6m²

hope you got your answer