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Perimeter & Area Lessons 19 & 20

Vocabulary Perimeter The OUTSIDE (total) area of a polygon Area
The INSIDE area of a polygon

Perimeter requires to add all the sides of a polygon
Formulas… Perimeter requires to add all the sides of a polygon Perimeter = side + side + side + … OR P = s + s + s +…

to multiply specific sides together
Formulas… Area requires to multiply specific sides together Area = length x width OR A = l x w Area = side x side A = s² Area = ½ (base x height) A = b x h 2

Perimeter & Area Perimeter Formula How to find Perimeter Area
Perimeter Formula How to find Perimeter Area How to Find Rectangles Squares Triangles Circles

Examples… Find the perimeter & area for the rectangle: 12 in 5 in

Examples… Find the perimeter & area for the square: 8 cm

Examples… Find the perimeter & area for the triangle: 6 in 12 in 8 in

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