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Algebraic Expressions

Algebraic Expressions

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Three-Sided Shapes

We call a three-sided shape a triangle You know these guys; they have been made famous thanks to pizza.

The perimeter of a triangle is the sum of its three sides. The area A of a triangle is given by the formula

.

This formula is the way it is because the triangle fills exactly half of a rectangle with side lengths b and h, as shown below.

 
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