Answer:
<h2>20 cm.</h2>
Step-by-step explanation:
We know that the permiter is defined as
Where 
is the longest side, 
is the smallest and 
is the middle side.
If 
then, 
, where we need to find an expression for using the law of cosines.
Replacing all expression, the perimeter is
Using a calculator, the perimeter is 20 units centimeters.
Answer:
b
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
divide 9 by 3/5 or .75
C and B is proportional relationships , because the proportional relationships always start at zero and the line must be straight !
Answer: To find the area of a rectangle, multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area.
