### Home > CALC > Chapter 1 > Lesson 1.3.2 > Problem 1-120

1-120.

A flag in the shape of a quarter-circle is shown below. Homework Help ✎

Imagine rotating the flag about its pole and describe the resulting three-dimensional figure. Draw a picture of this figure on your paper. Try this using the 1-120 eTool (Desmos).

Find the volume of the rotated flag.

What three-dimensional figure does this shape remind you of?

What is the formula for the volume of a sphere?

How would you determine the volume of half of a sphere?

Use the eTool below to visualize the rotating flag.

Click the link at right for the full version of the eTool: Calc 1-120 HW eTool