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Your teacher will give your group two circles of different sizes.
For each circle,
| diameter (cm) | estimated area (cm2) |
|---|---|
Plot your diameter and area values on the coordinate plane. What do you notice?
Earlier, you graphed the relationship between the diameter and circumference of a circle. How is this graph the same? How is it different?
The area of a circle is the number of square units it covers. If a circle has radius units, its area is square units.
For example, a circle has radius of 3 inches. Its area is , or , square inches. This is about 28.3 square inches.