Exercise 47 Page 402

Let's calculate the perimeter and area separately.

Perimeter

In general, the perimeter of a figure is the sum of its side lengths. In this case, we have a rectangle. A rectangle has two pairs of equal sides, so we can find its perimeter using the following formula. P=2l+2wIn this formula, l is the length and w is the width. From the picture, we know that l is equal to 10ft, and w is equal to 3ft.

P=2l +2w

SubstituteII

l= 10, w= 3

P=2( 10)+2( 3)

Multiply

Multiply

P=20+6

AddTerms

Add terms

P=26

The rectangle's perimeter is 26 feet.

Area

To find the area of the rectangle, we will use the formula for calculating the area of a rectangle. A=l * w We will substitute the given measurements, l=10ft and w=3ft, into the formula to calculate A.

A=l* w

SubstituteII

l= 10, w= 3

A= 10* 3

Multiply

Multiply

A=30

The area of the rectangle is 30ft^2.