Question

After 1 hour on this problem I still can't figure it out. Can someone help please?

Answer 1

a.800 + 100pi3.14cm2; 1,114 cm2
b.(800 + 40pi3.14)cm2; 926 cm2
c.800pi3.14cm2; 2,513 cm2
d.(800 + 50pi3.14) cm2; 957 cm2

Answer 2

Whats an area of a rectangle?

Answer 3

20 x 40

Answer 4

800

Answer 5

Great that's part of it.

The other part is half a circle can you tell me the area of a circle?

Answer 6

628

Answer 7

where did you get that?

Answer 8

1/2x 3.14 x 20^2

Answer 9

are is a circle is \[\pi r^2 \]
In this case we have half a circle so it's half
\[\frac{1}{2} \pi r^2\]

Answer 10

But the diameter is 20

Answer 11

\[2*r=diamater\]

Answer 12

okay

Answer 13

so you need to divide the diameter by 2 in order to get the radius then you can plug it in to the equation.

Answer 14

So it's 1/2*3.14*10^2

Answer 15

right?

Answer 16

yeah

Answer 17

what do you get?

Answer 18

d.(800 + 50pi3.14) cm2; 957 cm2

Answer 19

:D

Answer 20

No just D

Answer 21

Thank you so much! I was breaking playstations out of anger cause I couldn't figure it out :D

Answer 22

No problem