Question

If the radius of a circle is doubled, then its area will become ______.

Options

• doubled

• halved

• four times

• three times

Answer 1

If the radius of a circle is doubled, then its area will become four times.

Explanation:

The area of a circle is proportional to the square of its radius (πr²). When the radius is doubled (2r), the new area becomes π(2r)² = 4πr², which is four times the original area.