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Glencoe Math: Course 2, Volume 2

GM

Glencoe Math: Course 2, Volume 2 View details

5. Volume of Pyramids

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Exercise 25 Page 660

Use the formula for the volume of a pyramid.

H

Practice makes perfect

We want to find the volume of the following pyramid.

We can calculate the volume of a pyramid using the following formula. V=1/3Bh Here, B is the area of the base, and h is the height. The base of our pyramid is a 23 centimeters by 17 centimeters rectangle. Its area B is a product of these sides. Let's find it! B = 23( 17) = 391 The base's area B is 391 square centimeters. The height h is 11 centimeters. Let's substitute these values into the formula and calculate V.

V=1/3Bh

B= 391, h= 11

V=1/3( 391)( 11)

▼

Simplify right-hand side

Multiply

V=1/3(4301)

MoveRightFacToNumOne

1/b* a = a/b

V=4301/3

Calculate quotient

V=1433.666666...

Round to 1 decimal place(s)

V≈ 1433.7

The volume of the pyramid is about 1433.7 cubic centimeters. Therefore, answer H is correct.

Subchapter links

Guided Practice p.656

Independent Practice p.657-658

H.O.T. Problems p.658

Standardized Test Practice p.658-660

Extra Practice p.659

Common Core Review p.659