CPM Homework Help : CC2 Problem 9-90

Find the area and circumference of a circle that has a diameter of $17$ mm. Write your answers in terms of $\pi$ and as a decimal approximation.

Hint:

Use the formulas for the area and circumference of a circle:

Area: $\pi\cdot r^2$
Circumference: $\pi·2r$ or $\pi·d$

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

Partial Answer:

$\text{Area}=\pi(8.5)^2=72.25\pi\approx226.98\ \text{mm}^2$