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Envision Math 2.0: Grade 6, Volume 2

EM

Envision Math 2.0: Grade 6, Volume 2 View details

2. Solve Triangle Area Problems

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Exercise 7 Page 397

Use the formula for the area of a triangle.

12yd^2

Practice makes perfect

Let's take a look at the given triangle.

Remember that the area of a triangle is half the product of its base b and its height h. A=1/2bh In our triangle, the base is 6 yards and its corresponding height is 4 yards. We can substitute 6 into the formula to fill the first box. A &= 1/2b h A &= 1/2 * 6 * 4 A &= yd^2 Now, let's perform the multiplication.

A = 1/2b h

b= 6, h= 4

A = 1/2 * 6 * 4

MoveRightFacToNumOne

1/b* a = a/b

A = 6/2 * 4

Calculate quotient

A = 3 * 4

Multiply

A = 12

The area of the given triangle is 12 square yards. A &= 1/2b h A &= 1/26 * 4 A &= 12yd^2

Subchapter links

Do You Understand? p.396

Do You Know How? p.396

Practice & Problem Solving p.397-398

Assessment Practice p.398