Lesson 15 Circle functions
- The radius of this circle is 5 units. The radius is copied on the right. Complete the square on the radius on the right.
Find its area.
- Use the area of the square to estimate the area of the whole circle.
- How do you find the area of any square if you know the length of one side (without drawing or counting)?
- How can you estimate the area of any circle if you know its radius?
- Describe how the area of any circle is related to its radius. Use words or symbols.