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Glencoe Math: Course 2, Volume 2

GM

Glencoe Math: Course 2, Volume 2 View details

4. Volume of Prisms

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Exercise 2 Page 643

Use the formula for the volume of a prism.

396 cubic feet

Practice makes perfect

The given solid is a triangular prism.

The volume of a prism can be calculated using the following formula. V= B h Here, B is the area of a prism's base and h is the prism's height. Note that the base is a right triangle, so we can calculate its area using the formula for area of a triangle.

B=1/2bh

b= 8, h= 9

B=1/2( 8)( 9)

▼

Simplify right-hand side

MoveRightFacToNumOne

1/b* a = a/b

B=72/2

Calculate quotient

B= 36

The area of the base is 36 square feet. The prism's height equals 11 feet. Let's substitute these values into the formula and solve for V.

V=Bh

B= 36, h= 11

V=( 36)( 11)

Multiply

V=396

The volume of the prism is 396 cubic feet.

Subchapter links

Guided Practice p.642

Independent Practice p.643-644

H.O.T. Problems p.644

Standardized Test Practice p.644-646

Extra Practice p.645

Common Core Review p.646