Perimeter and Area Objective: Learn to find the perimeter and area.

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Presentation transcript:

Perimeter and Area Objective: Learn to find the perimeter and area

Theperimeterof a polygon is the distance around the outside of the polygon.  The perimeter of this yard is the distance around the outside of the yard, indicated by the red arrow; It is measured in linear units such as feet or meters. To find the perimeter add the length of each side. Perimeter: 8cm + 8cm + 3cm + 3cm = 22 cm  The formula for perimeter of a rectangle is: P= 2×L + 2×W Example: A rectangle has a length of 12 centimeters and a width of 4 centimeters. Find the perimeter.

To find the perimeter of a regular polygon, multiply the number of sides by the length of one side.  Find the perimeter of a regular pentagon with each side measuring 3 inches. Solution: A pentagon has 5 sides. So you have to multiply 5 × 3 in = 15 in Example: Find the perimeter of a regular hexagon with each side measuring 8 meters.

To find the area of a rectangle or a square…  You must multiply the length by the width.  The formula is: A = L × W; where A is the area, L is the length, and W is the width.  Example: A rectangle has a length of 8 centimeters and a width of 3 centimeters. Find the area. Solution: Area = 8 cm × 3 cm = 24 cm 2

Homework: Find the Perimeter and Area. GameBase (length)Height (Width) PerimeterArea Tennis (singles) 26 yd9 yd Volleyball60 ft30ft Badminton (singles)44 ft17 ft Cricket170 m160m racquetball40 ft20ft Ice hockey 61 m 30m NFL Football 360 ft130 ft