Mathematics
Area of a Circle
Calculate a circle area and circumference.
Area = πr²; Circumference = 2πr
Formula Explanation
Area measures the region enclosed by the circle; circumference measures its boundary.
Variables Explained
r = Radius; π ≈ 3.14159.
Solved Example
Find the area of a circle with radius 7 cm using π = 22/7.
Area = (22/7) × 7 × 7 = 154 cm².