Question

The formula for the area of a circle with diameter d is $A=\pi {\left(\frac{d}{2}\right)}^2$. Write an expression to represent the area of the circle.

Short answer

Area of circle is represented as $\pi {\left(\frac{y+5}{2}\right)}^2$

Step-by-step solution

- Observation from figure

From figure, diameter of circle is$y+5$

- Substitution 

Substitute$y+5$ for to get the expression for area of circle

- Required expression

Expression for area of circle is represented as $A=\pi {\left(\frac{y+5}{2}\right)}^2$

Thus, required expression is$A=\pi {\left(\frac{y+5}{2}\right)}^2$