Splash Screen. Lesson Menu Five-Minute Check (over Lesson 11–2) Main Idea and Vocabulary Key...
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Transcript of Splash Screen. Lesson Menu Five-Minute Check (over Lesson 11–2) Main Idea and Vocabulary Key...
Five-Minute Check (over Lesson 11–2)
Main Idea and Vocabulary
Key Concept: Circumference of a Circle
Example 1: Real-World Example: Find Circumference
Example 2: Find a Circumference
• circle
• center
• diameter
• circumference
• radius
• Find the circumference of circles.
• π (pi)
PETS Find the circumference around the hamster’s running wheel. Round to the nearest tenth.
Answer: The distance around the hamster’s running wheel is about 18.8 inches.
Find Circumference
C = 2r
Replace with 3.14 and r with 3.C ≈ 2(3.14)(3)
1. A
2. B
3. C
4. D0% 0%0%0%
A. 28.6 ft
B. 32.9 ft
C. 56.5 ft
D. 254.3 ft
SWIMMING POOL A new children’s swimming pool is being built at the local recreation center. The pool is circular in shape with a diameter of 18 feet. Find the circumference of the pool. Round to the nearest tenth.
Find a Circumference
Answer: The circumference of the circle is about 154 centimeters.
Find the circumference of a circle with a diameter of 49 centimeters.
.
1. A
2. B
3. C
4. D0% 0%0%0%
A. 54 ft
B. 123 ft
C. 178 ft
D. 220 ft
Find the circumference of a circle with a radius of 35 feet.
Five-Minute Check (over Lesson 11–2)
Image Bank
Math Tools
Area of Trapezoids
Drawing 3-D Figures
Area of Polygons
1. A
2. B
3. C
4. D
A B C D
0% 0%0%0%
(over Lesson 11-2)
A. 30.4 in2
B. 42 in2
C. 48.4 in2
D. 84 in2
Find the area of the figure. Round to the nearest tenth if necessary.
1. A
2. B
3. C
4. D
0% 0%0%0%
(over Lesson 11-2)
A. 28 cm2
B. 32 cm2
C. 36 cm2
D. 48 cm2
Find the area of the figure. Round to the nearest tenth if necessary.
1. A
2. B
3. C
4. D
0% 0%0%0%
(over Lesson 11-2)
A. 148.8 m2
B. 158.4 m2
C. 316.8 m2
D. 375.1 m2
Find the area of the figure. Round to the nearest tenth if necessary.
1. A
2. B
3. C
4. D
A B C D
0% 0%0%0%
(over Lesson 11-2)
A. 338 yd2
B. 161.4 yd2
C. 80.7 yd2
D. 52 yd2
Find the area of a triangle whose base is 15.75 yards and whose height is 10.25 yards.
1. A
2. B
3. C
4. D
A B C D
0% 0%0%0%
(over Lesson 11-2)
A. 35 ft2
B. 70 ft2
C. 150 ft2
D. 300 ft2
Bell has a triangular garden with a base of 20 feet and a height of 15 feet. Find the area of Bell’s garden.
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 11-2)
A. 132.3 m2
B. 121.1 m2
C. 144.6 m2
D. 155.8 m2
A trapezoid has bases of 14.7 meters and 12.2 meters, and a height of 9 meters. What is the area of the trapezoid to the nearest tenth?
