Home > GC > Chapter 8 > Lesson 8.3.3 > Problem 8-107
8-107.
Use what you know about the area and circumference of circles to answer the questions below. Show all work. Leave answers in terms of
If the radius of a circle is
units, what is its circumference? What is its area? Remember that the area of a circle is
, while the circumference of a circle is .
If a circle has diameter
units, what is its circumference? What is its area? Use the formulas given in part (a). What is the radius of this circle?
If a circle has circumference
units, what is its area?
Solve for the radius then use the radius to calculate the area.