Question

A=3.14r^2 and d=12 A=?

Answer 1

$\huge\boxed{113.04}$

Diameter ($d$) is equal to twice the radius ($r$). So, find the radius by dividing $\frac{12}{2}$. The radius, or $r$, is $6$.

Substitute in the value. $A=3.14*6^2$

Follow the order of operations and solve the exponent first. $A=3.14*36$

Multiply. $A=\boxed{113.04}$