© 2008 Pearson Addison-Wesley. All rights reserved 9-3-1 Chapter 1 Section 9-3 Perimeter, Area, and Circumference.

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Presentation transcript:

© 2008 Pearson Addison-Wesley. All rights reserved Chapter 1 Section 9-3 Perimeter, Area, and Circumference

© 2008 Pearson Addison-Wesley. All rights reserved Perimeter, Area, and Circumference Perimeter of a Polygon Area of a Polygon Circumference of a Circle Area of a Circle

© 2008 Pearson Addison-Wesley. All rights reserved Perimeter of a Polygon The perimeter of any polygon is

© 2008 Pearson Addison-Wesley. All rights reserved Perimeter of a Triangle The perimeter P of a triangle with sides of lengths a, b, and c is given by the formula

© 2008 Pearson Addison-Wesley. All rights reserved Perimeter of a Rectangle The perimeter P of a rectangle with length l and width w is given by the formula

© 2008 Pearson Addison-Wesley. All rights reserved Perimeter of a Square The perimeter P of a square with all sides of length s is given by the formula.

© 2008 Pearson Addison-Wesley. All rights reserved Area of a Polygon The amount of plane surface covered by a polygon is called its

© 2008 Pearson Addison-Wesley. All rights reserved Area of a Rectangle The area A of a rectangle with length l and width w is given by the formula

© 2008 Pearson Addison-Wesley. All rights reserved Example: Rectangle Find the perimeter and area of the rectangle below. 7 ft. 15 ft. Solution

© 2008 Pearson Addison-Wesley. All rights reserved Area of a Square The area A of a square with all sides of length s is given by the formula

© 2008 Pearson Addison-Wesley. All rights reserved Area of a Parallelogram The area A of a parallelogram with height h and base b is given by the formula

© 2008 Pearson Addison-Wesley. All rights reserved Area of a Trapezoid The area A of a trapezoid with parallel bases b and B and height h is given by the formula

© 2008 Pearson Addison-Wesley. All rights reserved Example: Area of a Parallelogram Find the area of the trapezoid below. Solution 13 cm. 5 cm. 7 cm.

© 2008 Pearson Addison-Wesley. All rights reserved Area of a Triangle The area A of a triangle with base b and height h is given by the formula

© 2008 Pearson Addison-Wesley. All rights reserved Example: Area With Multiple Shapes Find the area of the shaded region below. Solution 4 in.

© 2008 Pearson Addison-Wesley. All rights reserved Circumference of a Circle

© 2008 Pearson Addison-Wesley. All rights reserved Area of a Circle The area A of a circle with radius r is given by the formula.

© 2008 Pearson Addison-Wesley. All rights reserved Example: Circle Find the area and circumference of a circle with a radius that is 6 inches long (use 3.14 as an approximation for pi). Solution