The diagram shows two concentric circles. The inner circle has a circumference of $14\mathrm{\pi } \mathrm{mm}$. The outer circle has a radius of $9 \mathrm{mm}$. Determine the exact area of the shaded portion.

Find the area and perimeter of the following figure. Use $\mathrm{\pi }=\frac{22}{7}$

Find the area and perimeter of the following figure. Use $\mathrm{\pi }=\frac{22}{7}$

Find the area and perimeter of the following figure. Use $\mathrm{\pi }=\frac{22}{7}$

Find the area and perimeter of the following figure. Use $\mathrm{\pi }=\frac{22}{7}$

Find the area and perimeter of the following figure. Use $\mathrm{\pi }=\frac{22}{7}$

Find the area and perimeter of the following figure. Use $\mathrm{\pi }=\frac{22}{7}$

Find the area and perimeter of the following figure. Use $\mathrm{\pi }=\frac{22}{7}$

Find the area and perimeter of the following figure. Use $\mathrm{\pi }=\frac{22}{7}$