Download presentation

Presentation is loading. Please wait.

Published byKylan Banbury Modified over 2 years ago

1
Perimeter, Circumference and Area http://player.discoveryeduca tion.com/?blnPreviewOnly= 1&guidAssetId=6e7387cf- 1b6c-4607-9ce3- d9d8dbc34682blnPreviewOnly= 1&guidAssetId=6e7387cf- 1b6c-4607-9ce3- d9d8dbc34682

2
Perimeter and Circumference Perimeter : The distance around a geometric figure. Circumference: The distance around a circle.

3
Perimeter To find perimeter add the lengths of all the sides. – Example: Find the perimeter of the polygon 8 in 6 in 8 in 6 in P = 8 + 8 + 6 + 6 P = 28 The perimeter is 28 in

4
Perimeter – Example : Find the perimeter of the triangle 12 in 16 in P = 12 + 12 + 16 P = 40 The perimeter is 40 in

5
Your Turn…. Find the perimeter pg. 426 #1-3 ( 3 minutes) Make sure that there are no naked numbers. 1. P = 6 + 4 + 8 P = 18m 2. P = 7 + 5 + 5 + 7 P = 24in 3. P = 8 + 8 + 8 + 8 P = 32 ft

6
Circumference To find the circumference multiply times diameter, where is 3.14 C = d Diameter

7
Definitions Diameter (d): a line that passes through the center of a circle Radius (r): half the diameter d = 20, then r = 10 r = 15, then d = 30

8
Circumference Example: Find the circumference Diameter = 8 in Circumference = d C = 3.14(8) C = 25.12 The circumference is 25.12 in

9
Circumference Example: Find the circumference radius = 10 cm Circumference = d Diameter = 2r = 2 (10) = 20 C = 3.14(20) C = 62.8 The circumference is 62.8 cm

10
Your Turn…. Find the circumference pg. 426 # 7-9 No naked numbers. 7. C = d 8. C = d C = 3.14(12) C = 3.14(3) C = 37.7m C = 9.4 ft 9. C = d C = 3.14 (16) C = 50. 2 in

11
Area of Rectangles The area of a rectangle is the product of its length and width. A = ω ω

12
Area of Rectangles Find the area of the rectangle 10 ft 7.5 in A = ω A = 10(7.5) A = 75 ft² The area is 75 ft²

13
Area of Triangles The area of a triangle is half the product of its base b and its height h. A = bh height base

14
Area of Triangles Example: Find the area of the triangle 6 in 5 in A = bh A = 5(6) A = 15 in ²

15
Area of Circles The area of a circle is the product of and the square of the circle’s radius r. A = r² radius

16
Area of Circles Example: Find the area of the circle r = 3 m A = r² A = 3.14(3)² A = 3.14(9) A = 28.26 m ² The area of the circle is 28.26m ²

17
Area of Circles d = 8 in A = r² Radius = 4 in A = 3.14(4)² A = 3.14(16) A = 50.24 in² The area of the circle is 50.24in²

18
Lets Review Perimeter = Sum of all sides Circumference = d Area of a Rectangle = ω Area of a Triangle = bh Area of a Circle = r²

Similar presentations

Presentation is loading. Please wait....

OK

Facts about Area of Shapes Dr. Kent Bryant 5/2011.

Facts about Area of Shapes Dr. Kent Bryant 5/2011.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt online training Ppt on eddy current separator Work we do ppt online Ppt on content addressable memory cisco Ppt on rc phase shift oscillator using op-amp Ppt on plants for grade 2 Ppt on inhabiting other planets warming Ppt on conservation of minerals Ppt on grid interconnection of renewable energy sources Ppt on magic squares