Presentation is loading. Please wait.

Presentation is loading. Please wait.

Do Now 4/17/13 Take out HW from last night. Take out HW from last night.  Text p. 362, #1-24 all, 27, 32, 33 Copy HW in your planner. Copy HW in your.

Similar presentations


Presentation on theme: "Do Now 4/17/13 Take out HW from last night. Take out HW from last night.  Text p. 362, #1-24 all, 27, 32, 33 Copy HW in your planner. Copy HW in your."— Presentation transcript:

1 Do Now 4/17/13 Take out HW from last night. Take out HW from last night.  Text p. 362, #1-24 all, 27, 32, 33 Copy HW in your planner. 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. In your journal, find the perimeter of the figure below. 8 cm 10 cm

2 Text p. 362, #1-24 all, 27, 32, 33 Homework Text p. 362, #1-24 all, 27, 32, 33 1) 18 m 2) 24 in. 3) 32 ft 4) 36 in. 5) 20 m 6) 12 ft 7) 37.7 m 8) 9.4 ft 9) in. 10) 140 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; 42.1 yd 23) 5.3 in.; 33.3 in. 24) 1/2; 1 27) 96 ft 32) D 33) 28

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

4 Area of a Circle To find the area of a circle, square the radius of the circle and multiply by pi ( ). Area = Radius Diameter Section 9.2 “Area of a Circle”

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

6 Find the area of the shaded region of the circle. Use 3.14 for . Round your answer to the nearest hundredth. A = r 2 A = 3.14 · A  3.14 · 5.76 A  The measurement of the radius of the circle is 2.4 cm. 2.4 cm The area of the shaded region of the circle is about cm 2. 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 =

7 Section 9.3 “Area of Irregular Figures” figure that is irregular made up of simple geometric shapes, such as triangles, rectangles, and circles Composite Figure

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

9 Find the area of the figure. Use 3.14 for pi. 15 m 35 m Break the figures apart into simple shapes: circles, rectangles, squares, or triangles. Find the area for each part. Then find the sum. Area of semi-circles Area of rectangle Total m² m² m²

10 Find the area of the figure. 8 ft Break the figures apart into simple shapes: circles, rectangles, squares, or triangles. Find the area of each part. Then find the sum. Area of semi-circle Area of rectangle Total ft² + 64 ft² + 40 ft² ft² Area of triangle 10 ft

11 The foul poles down the 1 st and 3 rd 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

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


Download ppt "Do Now 4/17/13 Take out HW from last night. Take out HW from last night.  Text p. 362, #1-24 all, 27, 32, 33 Copy HW in your planner. Copy HW in your."

Similar presentations


Ads by Google