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Big Ideas Math Geometry, 2014

BI

Big Ideas Math Geometry, 2014 View details

Maintaining Mathematical Proficiency

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Exercise 12 Page 1

Use the formula for area of a triangle.

200in^2

We will use the formula for calculating the area of a triangle. A=1/2bh Now we substitute the value of the base, b=25in, and the value of the height, h=16in, into the formula to calculate A.

A=1/2bh

b= 25, h= 16

A=1/2( 25)( 16)

CommutativePropMult

Commutative Property of Multiplication

A=1/2* 16* 25

MoveRightFacToNumOne

1/b* a = a/b

A=16/2* 25

Calculate quotient

A=8* 25

Multiply

A=200

The area of the triangle is 200in^2.

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Exercises p.1