Area of a Circle Worksheet
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Area of a Circle Worksheet
Name:Date:Class:
1.Find the area of a circle with radius .
2.Find the area of a circle with radius .
3.Find the area of a circle with radius .
4.Find the area of a circle with radius .
5.Find the area of a circle with radius .
6.Find the area of a circle with radius .
7.Find the area of a circle with radius .
8.Find the area of a circle with radius .
9.Find the area of a circle with radius .
10.Find the area of a circle with radius .
11.Find the area of a circle with radius .
12.Find the area of a circle with radius .
13.Find the area of a circle with radius .
14.Find the area of a circle with radius .
15.Find the area of a circle with radius .
16.Find the area of a circle with radius .
17.Find the area of a circle with radius .
18.Find the area of a circle with radius .
19.Find the area of a circle with radius .
20.Find the area of a circle with radius .
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Worked Example
Problem: Pizza with radius 9 inches. Find area (π ≈ 3.14).
- A = πr² = 3.14 × 9²— Substitute r = 9.
- 9² = 81— Square the radius first.
- A = 3.14 × 81 = 254.34 in²— Multiply.
Answer: 254.34 in²
Frequently Asked Questions
r² is the radius squared. The circle area is approximately 3.14 times a square with side length equal to the radius.
Circumference is a length (no exponent on unit). Area is two-dimensional (unit is squared). Check your units.
Halve it first: r = d/2. Then use A = πr². Do not square the diameter — this is the most common error.