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Home > CC2 > Chapter 9 > Lesson 9.2.4 > Problem 9-90

9-90.

Find the area and circumference of a circle that has a diameter of mm. Write your answers in terms of and as a decimal approximation.  

Use the formulas for the area and circumference of a circle:
 
Area:
Circumference: or

A circle with a  horizontal line segment, labeled 17 mm, across the circle and through the center.