area of a circle
Area depends on the square of the radius. This topic is part of Mathematics within Science & Nature. This page currently draws on 4 supporting questions, with answers and bonus facts available below.
area of a circle trivia questions
What formula gives the area of a circle?
Answer: πr²
Bonus fact: Area depends on the square of the radius.
If a circle's radius doubles, its area changes by what factor?
Answer: Four
Bonus fact: Area scales with r squared.
A circle with radius 1 has area equal to what?
Answer: π
Bonus fact: Substituting r = 1 gives π.
What is the formula for the area of a circle with radius r?
Answer: πr²
Bonus fact: The area of a circle equals pi times the square of its radius.