Question

4. find the area of the irregular shape . Round to the nearest tenth



( 1point )


A. 90.2 cm2

B . 241 cm2

c. 65.1 cm2

D. 72.3 cm2

Answer 1

First, find the area of the rectangular area, which is w*h.

According to the graphic you attached, the 5cm is a side of the rectangle, not the half-circle.

Answer 2

So the width of the rectangle is 8cm and the height is 5cm.

8*5=40cm^2

Answer 3

so the answer is ?

Answer 4

Now, we find the area of the half-circle. We'll need to find the area of a full circle first, then divide it by 2. The area of a circle is pir^2. The diameter is given as 8cm. So divide that by 2 to find the radius: 8/2=4.

pi(4)^2=about 50.27cm^2

So divide that by 2: 50.27/2=about 25.14

Add that to the area of the rectangle: 25.14+40=about 65.1cm^2 so your answer is c