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Five-Minute Check (over Lesson 14–1)
Main Idea and Vocabulary
Example 1:Estimate Areas
Example 2:Estimate Areas
Example 3:Estimate Areas
• I will find and estimate the areas of figures by counting squares.
• area
Estimate Areas
Find the area of the figure at the right.
Step 1 Count the number of whole squares in the figure.
7 whole squares = 7 square units
Step 2 Count the number of half squares in the figure.
Estimate Areas
Step 3 Add the number of whole and half squares.
Answer:
1. A
2. B
3. C
4. D
0% 0%0%0%
A. 22 square feet
B. 24 square feet
C. 26 square feet
D. 30 square feet
Find the area of the figure.
Estimate Areas
The diagram to the right shows the floor plan for a shed. One square on the grid represents 1 square foot. About how many square feet is the area of the shed floor?
Step 1 Count the number of whole squares in the diagram.
37 whole squares = 37 square feet
Estimate Areas
Step 2 Count the number of partial squares in the diagram.
4 partial squares is about 2 square feet
Step 3 Add the number of whole and partial squares.
37 + 2 = 39 square feet
Answer: The area of the shed is about 39 square feet.
1. A
2. B
3. C
4. D
0% 0%0%0%
A. about 10 square feet
B. about 13 square feet
C. about 15 square feet
D. about 20 square feet
One square on the grid represents 1 square foot. About how many square feet is the area of the figure?
Estimate Areas
A lake is shown to the right. Each square represents 1 square mile. Estimate the area of the lake.
Step 1 Count the number of whole squares. There are 13 whole square which is 13 square miles.
Estimate Areas
Step 2 Count the number of partial squares.
20 partial squares is about 10 square miles.
Step 3 Add the number of whole and partial squares.
13 + 10 is about 23 square miles.
Answer: The area of the lake is about 23 square miles.
1. A
2. B
3. C
4. D
0% 0%0%0%
A. about 17 square miles
B. about 21 square miles
C. about 30 square miles
D. about 36 square miles
Each square represents 1 square mile. Estimate the area of the shape below.
End of the Lesson
Five-Minute Check (over Lesson 14–1)
Image Bank
Math Tool Chest
Volumes of Prisms
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 14–1)
A. 26 yd23
Find the perimeter of the figure.
B. 23 yd23
C. 22 yd35
D. 21 yd23
1. A
2. B
3. C
4. D
0% 0%0%0%
(over Lesson 14–1)
Find the perimeter of the figure.
A. 48.3 m
B. 48.9 m
C. 49.2 m
D. 49.3 m