Question

The drawing is composed of a rectangle and a semicircle. Find the area of the figure to the nearest unit. Please explain, thank you.

Answer 1

We know that
[area of the figure]=[area of rectangle]+[area of semi circle]

area of rectangle=b*h------> 10*18-----> 180 cm²

area of semicircle=pi*r²/2
diameter=18 cm
radius=18/2----> 9 cm
area of semicircle=pi*9²/2-----> 127.17 cm²

[area of the figure]=[180]+[127.17]------> 307.17 cm²
round to the nearest unit ------> 307 cm²

the answer is
the area of the figure is 307 cm²