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Perimeter

To calculate the perimeter of any shape, just add up “each” line

segment of the “fence”.

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Perimeter

• Triangles have 3 sides…add up each sides length.

88

8

8+8+8=24The Perimeter is 24.

3

Perimeter

A square has 4 sides for the fence.

12 12

12

12

12+12+12+12=48The perimeter is 48.

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Area• Area is the ENTIRE INSIDE of a

shape• It is always measured in “squares” (sq. inch, sq ft)

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AREA• Square units means“that” many squares

fit inside that shape (if measured in feet…it’s feet…if meters…it’s meters. In this example the area is 4 square units…note 4 squares fit)

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3 4

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