Hello!
You can use the Pythagorean Theorem to solve this.

c is the hypotenuse which is the side opposite of the right angle
a and b are the other sides
Put in the values you know

Square the numbers

Subtract 576 from both sides

Take the square root of both sides
a = 7
The answer is 7
Hope this helps!
Answer:
256
Step-by-step explanation:
b^2 + 2bl
8^2 + 2(8)(12)
64 + 16(12)
64 + 192
= 256
Hi there!
The formula for the perimeter of a rectangle is P = 2 (l + w).
We can simplify this formula so that we can find the solutions easier.
P = 40
40 = 2 (l + w)
divide both sides by 2
40/2 = l + w
20 = l + w
So the length + width has to equal to 20.
So your answers would be B , C , D.
Hope this helped! :)
Answer:
pls make it even more clear
Step-by-step explanation: