Question

Question 10 (5 points)Find the area of the shaded portion if we know the outer circle has a diameter of 4 mand the inner circle has a diameter of 1.5 m.

Answer 1

Hello there. To solve this geometry question, we'll need to remember how to find the area of an annulus.

Let's start by drawing the circles:

Remember that the area of the shaded area, between the outer and inner circle, called annulus, can be calculated by subtracting the area of the outer circle and the area of the inner circle:

The area of a circle with diameter D is given by:

`\pi\cdot\text{ }\frac{D\text{\textasciicircum{}2}}{4}`