We can start by using the formula for the area of a rectangle:
Area = length x width
We know that the width is 9 inches and the area is 135 square inches, so we can solve for the length:
135 = length x 9
length = 135/9
length = 15
So each place mat is 15 inches long.
To find the perimeter (the total length of all the sides), we can use the formula:
Perimeter = 2 x length + 2 x width
Plugging in the values we know, we get:
Perimeter = 2 x 15 + 2 x 9
Perimeter = 30 + 18
Perimeter = 48
So all the sides of the place mat add up to 48 inches.
Kristina made rectangular place mats for her dining room table, as shown below. The area of each place mat is 135 square inches. The width of each place mat is 9 inches. How many inches long are all the sides of the place mat?
1 answer