LESSON
32 Additional Practice
Name For exercises 1 and 2, circle the correct answer.
1. What is the area of this figure?
20 mm
8 cm
Copyright © by William H. Sadlier, Inc. Permission to duplicate classroom quantities granted to users of Common Core Progress.
36 mm
a. 448 mm2
b. 288 mm2
c. 224 mm2
d. 160 mm2
2. What is the area of the nature reserve?
7 mi
2.5 mi
1 mi
5 mi
a. 9.5 mi2
b. 12.5 mi2
c. 15.5 mi2
d. 17.5 mi2
Solve the problems.
3. Marianne drew a trapezoid in her notebook. The bases of her trapezoid
are 3 inches and 5 inches long. The height is 3 inches. What is the area of
the trapezoid Marianne drew?
Answer
Lesson 32 ■ Find Area of Polygons
1
LESSON
32 Additional Practice
4. Joanie is painting a wall that is shaped like a trapezoid.
The window in the wall is 1 meter tall and 0.5 meter wide.
What is the area of the wall that Joanie will paint?
2m
2.5 m
4m
Copyright © by William H. Sadlier, Inc. Permission to duplicate classroom quantities granted to users of Common Core Progress.
Answer
5. Stefan and Sheila are tiling a floor in the shape of the figure below.
They need to find the area of the floor so they know how many tiles
to buy. First, they each decompose the figure into rectangle A and
rectangle B. Then, they add the areas of those rectangles.
12 ft
4 ft
10 ft
3 ft
a. Stefan’s rectangle A is 12 feet by 4 feet. Show Stefan’s work to
find the total area of the figure.
Lesson 32 ■ Find Area of Polygons
2
LESSON
32 Additional Practice
Copyright © by William H. Sadlier, Inc. Permission to duplicate classroom quantities granted to users of Common Core Progress.
b. Sheila’s rectangle A is 10 feet by 3 feet. Show Sheila’s work to find the
total area of the figure.
c. Explain how Stefan and Sheila could find the total area of the figure
by subtracting the areas of rectangles instead of adding.
Lesson 32 ■ Find Area of Polygons
3