Question

How many times greater is the area of circle 1 than the area of circle 2?

Circle 1 =18mm
Circle 2 =6mm

Answer 1

9 times

Explanation:

Radius R₁ = 18 = 3 * 6 = 3R₂

Area A₁ = πR₁² = π(3R₂)² = 9 * πR₂² = 9A₂