1. Perimeter & Area
Lessons 19 & 20

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

3. 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 +…

4. 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

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

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

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

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