Question 569358: if a rectangle has a perimeter of 36 inches and length of 5 inches what is the area
Answer by IWork4Dessert(60)   (Show Source):
You can put this solution on YOUR website! What do you know about rectangles? In order for a shape to be a rectangle, it has to have two pairs of equal sides. You can start by drawing one up(I'm afraid I can't draw one in this text box, so bear with me).
First of all, you know that the length of one of the sides is 5. But if a rectangle has two pairs of equal sides, then the length opposite that one will be 5 as well. Go ahead and label those.
Now. You know that the perimeter is 36. Perimeter is all of the sides added together. The sides we don't know the lengths of are going to be equal too, like I said above. Two of the sides together(5+5) are 10. Your equation:
36=10+2x
Now subtract 10 from both sides(remember, you're trying to get the variable--the letter--alone).
26=2x
Divide both sides by 2 to get the variable by itself.
13=x
Since the problem is asking for the area, all you have to do is multiply the short side(5) by the long side(13).
5x13=65
65 inches squared
|
|
|
