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Home > CCG > Chapter 9 > Lesson 9.2.4 > Problem 9-103

9-103.

Find the volumes of the solids below. Homework Help ✎

  1. cylinder with a hole
    Cylinder

    Recall the formula for the volume of a cylinder.
    Cylindrical volume = (area of the base)×(height)

  1. regular octagonal prism
    Prism

    Divide the octagonal base into congruent triangles to find its area.

    Now use the formula (volume) = (area of the base)×(height) to find the volume of the prism.

    Base Area
    Volume