# Area, Volume, and Arc Length

### Example 1

Let *R* be the shaded region graphed below.

Without using calculus, find the area of *R*.

### Example 2

Let *R* be the shaded region graphed below.

Use integration with vertical strips to find the area of *R*.

### Example 3

Let *R* be the shaded region graphed below.

Use integration with horizontal strips to find the area of *R*.