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Envision Math 2.0: Grade 6, Volume 2
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Envision Math 2.0: Grade 6, Volume 2 View details
2. Solve Triangle Area Problems
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Exercise 12 Page 397

Use the formula for the area of a triangle.

24m^2

Practice makes perfect

Let's take a look at the given triangle.

Remember the formula for the area of a triangle. A=1/2bh In this formula, b is the length of the base and h is the height. For our triangle, we will substitute b= 8 meters for the base and h= 6 meters for the height into the formula to calculate A. Let's do this!
A=1/2bh
SubstituteII

b= 8, h= 6

A=1/2( 8)( 6)
MoveRightFacToNumOne

1/b* a = a/b

A=8/2* 6
CalcQuot

Calculate quotient

A=4 * 6
Multiply

Multiply

A=24
The area of the triangle is 24 square meters. Notice that we can also use the base that is 10 meters and its corresponding height of 4.8 meters.
Let's calculate the area using these values.
A=1/2bh
SubstituteII

b= 10, h= 4.8

A=1/2( 10)( 4.8)
MoveRightFacToNumOne

1/b* a = a/b

A=10/2* 4.8
CalcQuot

Calculate quotient

A=5 * 4.8
Multiply

Multiply

A=24
We ended with the same result as before. Remember that it does not matter what base and corresponding height we use to calculate the area.
Subchapter links expand_more
arrow_right Do You Understand? p.396
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arrow_right Do You Know How? p.396
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Do You Know How? 5 (Page 396)
Do You Know How? 6 (Page 396)
arrow_right Practice & Problem Solving p.397-398
Practice & Problem Solving 7 (Page 397)
Practice & Problem Solving 8 (Page 397)
Practice & Problem Solving 9 (Page 397)
Practice & Problem Solving 10 (Page 397)
Practice & Problem Solving 11 (Page 397)
Practice & Problem Solving 12 (Page 397)
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Practice & Problem Solving 14 (Page 397)
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arrow_right Assessment Practice p.398
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