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Big Ideas Math: Modeling Real Life, Grade 6

BI

Big Ideas Math: Modeling Real Life, Grade 6 View details

6. Surface Areas of Pyramids

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Exercise 3 Page 323

Remember the formula for the surface area of a cube.

384 square inches

Practice makes perfect

We want o calculate the surface area of a cube. Let's see the given cube.

To calculate the surface area of a cube, we can use the following formula. S=6 s^2 Since the variable s represents the length of the edge of the cube, s^2 is the area of each face. We multiply this value by 6 because all the faces of a cube are squares with the same dimensions. Let's substitute s= 8 into the formula to calculate the surface area.

S=6s^2

s= 8

S=6( 8)^2

Calculate power

S=6(64)

Multiply

S=384

The surface area of the cube is 384 square inches.

Subchapter links

Try It p.320-321

Self-Assessment for Concepts & Skills p.321

Self-Assessment for Problem Solving p.322

Review & Refresh p.323

Concepts, Skills, & Problem Solving p.323-324