Question

See the above figure. What is the value of angle A?

Options

• 0°

• 23½°

• 66½°

• 90°

Answer 1

66½°

Explanation:

The measure of angle A is 66½°. This angle represents the tilt of the Earth’s axis relative to its orbital plane (the plane of the Earth’s orbit). While the axis tilts 23½° from a vertical perpendicular line, it maintains a constant 66½° angle with the flat orbital path.