Mathematics for IGCSE & O level - Equations (Section 8 - No. 24)

If the area of a circle is 28.26 cm², and you know the formula is A = πr², what are the first steps to rearrange to find the radius?

Divide by π, then multiply by 2.

Divide by π, then square root.

Square root, then divide by π

Multiply by π, then square root.

To isolate r, divide both sides by π, then square root.