Answer:
Area of white circle = 346.36 cm²
Explanation:
Area of a circle = πr² where r is the radius
r = diameter/s
For the green circle, d = 42, r = 21
A = π(21)² = 1,385.44 cm²
The white circle has a diameter half of the green circle = 42/2 = 21 cm
So radius of white circle = 21/2 = 10.5 cm
Area of white circle = π (10.5)² = 346.36 cm²