Use your findings from problem 8-79 to answer the questions below. Recall that theof a circle is a segment with endpoints on the circle that passes through the center. The length of the segment is also called the diameter.
What is the area of a circle with radius
For a circle, area
What is the circumference of a circle with diameter
For a circle, circumference
If the area of a circle is
square units, what is its diameter?
Use the formula for area of circle and solve for the radius.
What is the diameter?
If the circumference of a circle is
units, what is its area?
Use the circumference formula and solve for the diameter.
What is the radius? Use the radius to calculate the area.