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Home > GC > Chapter 9 > Lesson 9.2.4 > Problem 9-89

9-89.

Find the volumes of the solids below.  

  1. cylinder with a hole

    Recall the formula for the volume of a cylinder.

  1. regular octagonal prism

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

    Now use the formula to find the volume of the prism.