Find the area of the irregular shape. Round to the nearest tenth.

(the figure is an attachment)

90.2 cm²
241 cm²
65.1 cm²
72.3 cm²

Question

Find the area of the irregular shape. Round to the nearest tenth.

(the figure is an attachment)

90.2 cm²
241 cm²
65.1 cm²
72.3 cm²

anonymous · Answer

This is the figure:

anonymous · Answer

think of it as the area of half a circle and a rectangel. do you know the area formulas?

anonymous · Answer

Yes. Semi circle is A= 1/2 pi r squared.

rectangle is b X h

anonymous · Answer

but I am confused because I don't have a radius. Right?

anonymous · Answer

u do it is 8, the same as thelength of the rectangle

anonymous · Answer

sorry 8/2

anonymous · Answer

so r = 4, can u solve it now?

anonymous · Answer

25.12?

anonymous · Answer

i got 65.1

anonymous · Answer

How did you do it?? I was getting the area of a semi circle.
(pi r squared / by 2)
4 X 4 = 16
16*3.14 = 50.24
50.24/2 = 25.12

anonymous · Answer

Now the rectangle area (8 X 5) is 40.

I just added 40 + 25.12 and I got 65.12.

anonymous · Answer

yup that is right

anonymous · Answer

OH. It says round to the nearest tenth! Okay so would it be answer choice C?

anonymous · Answer

yup

anonymous · Answer

Wait what about that little extra space on the bottom? Is that covered in the 8 cm?

anonymous · Answer

ok nevermind lol