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Glencoe Math: Course 3, Volume 2 View details

5. Surface Area of Cones

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Exercise 6 Page 635

The given solid is a cone.

To calculate the surface area of a cone, we can use the known formula where r is the radius of the base and l is the slant height of the cone. S=π rl+π r^2 Looking at the diagram, we know that the radius of the cone's base is 7 meters and that the the slant height of the cone equals 16 meters. By substituting r with 7 and l with 16 into the formula, we can calculate S.

S=π rl+π r^2

SubstituteII

r= 7, l= 16

S=π( 7)( 16)+π( 7)^2

▼

Evaluate right-hand side

CalcPow

Calculate power

S=π(7)( 16)+π(49)

Multiply

S=112π+49π

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