Question

A circle has its centre at (4, 4). If one end of a diameter is (4, 0), then the coordinates of the other end are ______.

Options

• (0, 4)

• (4, 8)

• (4, –8)

• (–4, –8)

Answer 1

A circle has its centre at (4, 4). If one end of a diameter is (4, 0), then the coordinates of the other end are (4, 8).

Explanation:

The centre bisects the diameter, so the other end is \((2 \times 4 - 4, 2 \times 4 - 0) = (4, 8)\).