Perimeter & AreaLessons 19 & 20

Vocabulary

PerimeterThe OUTSIDE (total) area of a polygon

AreaThe INSIDE area of a polygon

Formulas…

Perimeterrequires to add all

the sides of a polygon

Perimeter = side + side + side + …

OR

P = s + s + s +…

Formulas…

Arearequires

to multiply specific sides together

Area = length x widthOR

A = l x w

Area = side x sideOR

A = s²

Area = ½ (base x height)OR

A = b x h 2

Perimeter & Area  Perimeter

FormulaHow to find Perimeter Area

FormulaHow to Find

Area

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