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**Do Now 4/17/13 Take out HW from last night. Copy HW in your planner.**

Text p. 362, #1-24 all, 27, 32, 33 Copy HW in your planner. Text p. 366, #7-15 all, 24, 29 Text p. 370, #7-17 all Quiz sections Friday In your journal, find the perimeter of the figure below. 8 cm 10 cm

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**Homework Text p. 362, #1-24 all, 27, 32, 33 1) 18 m 2) 24 in. 3) 32 ft**

11) 48 cm 12) 30 ft 13) 44 m 14) 26 in. 15) 8 ft 16) 36.4 cm 17) 110 cm 18) 18.8 m 19) 32 in. 20) about 29 in. 21) 2.8 m; 5.7 m 22) 13.4 yd; yd 23) 5.3 in.; in. 24) 1/2; 1 27) 96 ft 32) D 33) 28

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Objective SWBAT find the area of a circle and the area of irregular figures

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**Section 9.2 “Area of a Circle”**

To find the area of a circle, square the radius of the circle and multiply by pi ( ). Area = Radius Diameter

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Try It Out!! Find the area of the following circles. A) B). 3 m 4 m

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**Find the area of the shaded region of the circle. Use 3. 14 for **

Find the area of the shaded region of the circle. Use 3.14 for . Round your answer to the nearest hundredth. The measurement of the radius of the circle is 2.4 cm. A = r2 2.4 cm A = 3.14 · 2.42 A 3.14 · 5.76 A 18.09 Since of the circle is shaded, divide the area of the circle by 4 and subtract the answer from the entire area ÷ 4 = – 4.52 = 3 4 The area of the shaded region of the circle is about cm2.

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**Section 9.3 “Area of Irregular Figures”**

Composite Figure figure that is irregular made up of simple geometric shapes, such as triangles, rectangles, and circles

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**Estimate the area of the figure. Each square represents 1ft².**

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**Find the area of the figure. Use 3.14 for pi.**

Break the figures apart into simple shapes: circles, rectangles, squares, or triangles. Find the area for each part. Then find the sum. 15 m 35 m Area of rectangle Area of semi-circles Total m² m² 701.6 m²

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**Find the area of the figure.**

Break the figures apart into simple shapes: circles, rectangles, squares, or triangles. Find the area of each part. Then find the sum. 8 ft Area of triangle Total Area of semi-circle Area of rectangle 25.12 ft² ft² ft² ft²

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The foul poles down the 1st and 3rd base lines on a baseball field are 250 feet from home plate. Find the area of the field. Break the figures apart into simple shapes: circles, rectangles, squares, or triangles. Find the distance around each part. Area of quarter-circle

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24 Homework Text p. 366, #7-15 all, 24, 29 Text p. 370, #9-17 all

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Copyright © 2011, Elsevier Inc. All rights reserved. Chapter 6 Author: Julia Richards and R. Scott Hawley.

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