Splash Screen. Lesson Menu Five-Minute Check (over Lesson 11–2) Main Idea and Vocabulary Key Concept: Circumference of a Circle Example 1:Real-World Example:

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Splash Screen

Lesson Menu 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

Main Idea/Vocabulary circle center diameter circumference radius Find the circumference of circles. π (pi)

KC 1

Example 1 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 = 2  r Replace  with 3.14 and r with 3. C ≈ 2(3.14)(3)

1.A 2.B 3.C 4.D Example 1 A.28.6 ft B.32.9 ft C.56.5 ft D 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.

Example 2 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.D Example 2 A.54 ft B.123 ft C.178 ft D.220 ft Find the circumference of a circle with a radius of 35 feet.

Resources 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 Five Minute Check 1 (over Lesson 11-2) A.30.4 in 2 B.42 in 2 C.48.4 in 2 D.84 in 2 Find the area of the figure. Round to the nearest tenth if necessary.

1.A 2.B 3.C 4.D Five Minute Check 2 (over Lesson 11-2) A.28 cm 2 B.32 cm 2 C.36 cm 2 D.48 cm 2 Find the area of the figure. Round to the nearest tenth if necessary.

1.A 2.B 3.C 4.D Five Minute Check 3 (over Lesson 11-2) A m 2 B m 2 C m 2 D m 2 Find the area of the figure. Round to the nearest tenth if necessary.

1.A 2.B 3.C 4.D Five Minute Check 4 (over Lesson 11-2) A.338 yd 2 B yd 2 C.80.7 yd 2 D.52 yd 2 Find the area of a triangle whose base is yards and whose height is yards.

1.A 2.B 3.C 4.D Five Minute Check 5 (over Lesson 11-2) A.35 ft 2 B.70 ft 2 C.150 ft 2 D.300 ft 2 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.D Five Minute Check 6 (over Lesson 11-2) A m 2 B m 2 C m 2 D m 2 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?

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