Reteaching
Name
12-1
Area of Rectangles
Find the area of a rectangle that is
8 inches long and 3 inches wide.
A garden measures 8 ft by 7 ft. What is
the area of the garden?
Use Counting
Draw the rectangle on grid paper. Let
each square represent 1 square inch.
Use Counting
Draw the figure on grid paper. Let each
square represent 1 square foot.
3 inches
7 feet
8 inches
Count the squares inside the rectangle.
There are 24 squares, so the area is
24 sq in.
8 feet
Count the squares inside the garden. There
are 56 squares, so the area is 56 sq ft.
Use a Formula
Use the formula for area.To find area,
multiply length times width.
A 5  3 w
A5833
A 5 24
Use a Formula
Find the area of the rectangular garden by
multiplying length times width.
Garden:
A53w
A5837
A 5 56 sq ft
 5 length, w 5 width
 5 8, w 5 3
The area of the rectangle is 24 in2.
The area of the garden is 56 ft2.
Find the area of each figure.
1.
6 mm
2.
14 mm
3.
25 yd
9.2 m
20 m
12 yd
4. Suppose a rectangular garden measures 4​ _12 ​feet
by 10 feet. What is the area of the garden?
R 12•1
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. 6