Question

What is the approximate area of the shaded region?

A.
104.86 cm²

B.
87.47 cm²

C.
27.02 cm²

D.
10.54 cm²


http://static.k12.com/calms_media/media/1419000_1419500/1419367/2/68b362e32751322fd71cbfd25b483ee982b88ce8/MS_PA_130922_171138.jpg


I have no clue :/ @beccaboo333

Answer 1

same as u no clue lmao

Answer 2

haha...

Answer 3

hope u fined some one who dose lol

Answer 4

Yea ik..

Answer 5

o.o

Answer 6

now... the radius of the circle is AF

and AF is equal to CD

and CE is half of the line CD

and in ur question

CD = 7 cm
then
CE = 1/2 CD = 7/2 = 3.5
which means the radius of the circle is 3.5

and i think u can find the area of the square...

so..

Area of the shaded region = area of the square - area of the circle

can u do it now ?

Answer 7

Wow o.o

Answer 8

The side of the square is the diameter of the circle.
1. Find the area of the square. \(A_{square} = s^2\)
2. Find the radius of the circle. \(r = \dfrac{d}{2} \), where r = radius & d = diameter.
3. Find the area of the circle. \(A_{circle} = \pi r^2\)
4. Subtract the area of the circle from the area of the square.

Answer 9

i got 24.5 o.o

Answer 10

I didn't get that, but I did get one for the choices as my answer.

Answer 11

nvm i cant do this im a complete idiot im just gonna exit the thing and fail it thanks for trying to help

Answer 12

What did you get for the area of the square?

Answer 13

No. Give it a chance. We'll do it one step at a time.

Answer 14

The area of the square is the side times the side.
The side of the square is 7 cm.
What is the area of the square?
7 cm * 7 cm = ?

Answer 15

i got 49

Answer 16

Ok. See, you're not an idiot.
That's correct.

Now we need to find the area of the circle.

Answer 17

The diameter of the circle is 7 cm.
The radius of the circle is half the diameter.
The radius is half of 7 cm.
What is 7 cm/2 = ?

Answer 18

Omg sorry i read that as " okay so ur an idiot" xD im sorry

Answer 19

i got 3.5

Answer 20

Great.
To find the area of the circle, you use the formula

\(A = \pi r^2\)

\( \pi \) is a Greek letter called "pi" pronounced as "pie".
Its value is approximately 3.14.
We know the radius is 3.5 cm.

\(A = 3.14 \times 3.5 ~cm \times 3.5 ~cm,\)

Can you just multiply those three numbers above to find the area of the circle?

Answer 21

38.465

Answer 22

Great. Just what I got.

Now we do the finale step.
We subtract the area of the circle from the area of the square. The amount left is the shaded area.

What is \(49~cm^2 - 38.465 ~cm^2 =\)

Answer 23

i got 10.535

Answer 24

Which is approximately 10.54 cm^2.

It's one of the choices.

Answer 25

Thank you so much

Answer 26

Good job!
You're welcome.