### Home > MC2 > Chapter 9 > Lesson 9.3.3 > Problem9-112

9-112.

Find the area and circumference of a circle with a diameter of $14.4$ inches. Round your answer to the nearest hundredth.

Area: $π\cdot{r^2}$

Circumference: $π · 2r$

Find the radius based on the given diameter and substitute in for $r$ to solve for the area and circumference.

$A = π (7.2)^2 ≈ 162.86$ in$^2$
What would the circumference be?