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Home > PC > Chapter 4 > Lesson 4.2.3 > Problem 4-101


A cone has a height of inches and a radius of inches. If a plane cuts the cone inches below the cone's peak, what is the area of the circular cross section?

Find first in terms of using proportions.

Substitute your result for r into the area formula.

Cone pointing up, segment from vertex to center of circle base, labeled 10, with circle contained within the cone about 1 third down, segment from vertex to the upper circle labeled, x, radius on circle base meeting right edge of cone, labeled 4.