Question

glados is baking a pie. the diameter of the pie is 10 inches. what is the area of the pie? use 3.14 or a calculator button for pi and provide an answer accurate to the nearest tenth.

Explanation:

Step1: Find the radius

The radius $r$ of a circle is half of the diameter $d$. Given $d = 10$ inches, so $r=\frac{d}{2}=\frac{10}{2}=5$ inches.

Step2: Calculate the area

The formula for the area $A$ of a circle is $A = \pi r^{2}$. Substitute $r = 5$ inches and $\pi=3.14$ into the formula: $A=3.14\times5^{2}=3.14\times25 = 78.5$ square - inches.

Answer:

78.5 square inches