Question

10.) a = πr²; r = 4.5, π = 3.14 (area of a circle)

Explanation:

Step1: Substitute values into formula

We have the formula for the area of a circle \( A=\pi r^{2} \), and we know that \( r = 4.5 \) and \( \pi=3.14 \). Substitute these values into the formula: \( A = 3.14\times(4.5)^{2} \)

Step2: Calculate \( (4.5)^{2} \)

First, calculate the square of \( 4.5 \). \( (4.5)^{2}=4.5\times4.5 = 20.25 \)

Step3: Multiply by \( \pi \) (3.14)

Now, multiply \( 3.14 \) by \( 20.25 \). \( A=3.14\times20.25 = 63.585 \)

Answer:

The area of the circle is \( 63.585 \)