Please Explain! Will medal.

What is the area of the rectangle? Round to the nearest square inch.

A.
27 in2

B.
31 in2

C.
45 in2

D.
47 in2

http://static.k12.com/calms_media/media/1579000_1579500/1579373/2/4ac8cba629d8de89098f07b616577fd1aa6b2747/MS_IMC-150126-130912.jpg

Question

Please Explain!   Will medal.

What is the area of the rectangle? Round to the nearest square inch.

A.
27 in2
 
 B.
31 in2
 
 C.
45 in2
 
 D.
47 in2

http://static.k12.com/calms_media/media/1579000_1579500/1579373/2/4ac8cba629d8de89098f07b616577fd1aa6b2747/MS_IMC-150126-130912.jpg

anonymous · Answer

@iGreen 
@mathsciencehistory 
@Chiko_1278

panda.exe · Answer

Area = w × h

anonymous · Answer

Yeah but I don't have the width

anonymous · Answer

So im not sure what to do

panda.exe · Answer

ok

igreen · Answer

Use the Pythagorean Theorem to find the length.

igreen · Answer

We're given the Hypotenuse and one of the legs.

$\sf a^2 + 5^2 = 8^2$

Solve for 'a'

anonymous · Answer

So would I be working backwards?

igreen · Answer

Subtract $\sf 5^2$ to both sides.

anonymous · Answer

64 - 25 = 39
25-25 = 0

anonymous · Answer

what should I do next?

igreen · Answer

Now we have:

$\sf a^2 = 39$

Find the square root of both sides

igreen · Answer

@Gummibear127 

$\sf a = \sqrt{39}$