logging in or signing up Finding Area and Perimeter mrferrell Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 3380 Category: Education License: All Rights Reserved Like it (1) Dislike it (0) Added: July 19, 2009 This Presentation is Public Favorites: 1 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Slide 1: 1 This pool measures 25 ¼ feet by 80 feet. What is the perimeter of the pool? Objective : 2 Objective Solve real-world problems involving area and perimeter. Determining Perimeter : 3 Determining Perimeter Slide 4: 4 Equation: P = 15 + 12 + 13 P = 30 m Tom is going to put a fence around his rock garden. His garden is in the shape of a triangle with the sides measuring 15 m, 12 m and 13 m. How much fence does he need? Slide 5: 5 6 + 7 + 8 + 8 = P P = 29 inches Finding the Area? : 6 Finding the Area? How do you find the area of a square? How do you find the area of a rectangle? How do you find the area of a triangle? Formulas : 7 Formulas Triangle = ½ x base x height Rectangle = length x width Square = s2 Area of a Triangle : 8 Area of a Triangle Calculate the area of each triangle. 5 cm 3 cm 10 ft 12 ft 13 ft 13 ft 4 cm Area of a Rectangle : 9 Area of a Rectangle Calculate the area of each rectangle. 4 ft 7 m 12 ft 5 m Area of a Square : 10 Area of a Square Calculate the area of the square. Area of a Square : 11 Area of a Square Calculate the area of each square. 2 cm Area of a Rectangle : 12 Area of a Rectangle Calculate the area of the rectangle by multiplying length times width. A = L × W = 9 × 3 = 27 cm2 Area of a Triangle : 13 Area of a Triangle Area = ½ × base × height height base base height Area of a Triangle : 14 Area of a Triangle Area = ½ × base × height 10 in 4 in 6 m 8 m A = ½ × 6 × 8 = 3 × 8 = 24 m2 A = ½ × 4 × 10 = 2 × 10 = 20 in2 Triangle vs. Rectangle : 15 Triangle vs. Rectangle Base = length Height = width Area of Triangle = ½ of Area of Rectangle = ½ (L × W) or ½ (base × height) Example : 16 Example A typical size for a photograph is 8 × 10 inches. What is the area of the photo? Example : 17 Example Mr. Liddle is re-painting his chalkboard and needs to know its area in order to buy enough paint. His chalkboard is 4 ft tall and 6 ft long. What is the area of the chalkboard? Demonstration : 18 Demonstration Marie is making a quilt by cutting fabric squares diagonally across into triangles. What is the area of each triangle created from a 4-inch square? 4 in 4 in 4 in Demonstration : 19 Demonstration Area of triangle = ½ × base × height = ½ × 4 × 4 = 8 in2 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.