Question

A circle with radius of \greenD{1\,\text{cm}}1cmstart color #1fab54, 1, start text, c, m, end text, end color #1fab54 sits inside a \blueD{3\,\text{cm} \times 4\,\text{cm}}3cm×4cmstart color #11accd, 3, start text, c, m, end text, times, 4, start text, c, m, end text, end color #11accd rectangle

Answer 1

Answer:

$8.86cm^2$

Step-by-step explanation:

Given the rectangle of 3cm by 4cm and a circle of 1 cm inside it:

The Area of the shaded portion =Area of Rectangle-Area of Circle

Area of a Rectangle=Length X Width$=3 X 4 =12cm^2$

Area of the circle =$\pi r^2=\pi X 1^1=3.142cm^2$

Area  of the shaded portion=12-3.142

$=8.86cm^2$