SOLUTION: Hi there, My question is; The length of a rectangle is 9cm and its Perimeter is 30cm. What is the area of a rectangle? I have tried solving the question by trying to figure out

Algebra ->  Rectangles -> SOLUTION: Hi there, My question is; The length of a rectangle is 9cm and its Perimeter is 30cm. What is the area of a rectangle? I have tried solving the question by trying to figure out       Log On


   

Question 836045: Hi there,
My question is;
The length of a rectangle is 9cm and its Perimeter is 30cm. What is the area of a rectangle?
I have tried solving the question by trying to figure out the height so I could times the length by height but I dont know how to find the hieght of a Rectangle.
Thanks
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
L+=+9
h for "height"
2L%2B2h=30

What to do?
2%2A9%2B2h=30, simple substitution.
Solve for h.