Question: What is the measure of an angle formed by a tangent and a chord drawn from the point of contact?

Options:

1. It is equal to the angle subtended by the chord at the center.
2. It is equal to half the angle subtended by the chord at the circumference.
3. It is equal to the angle subtended by the tangent at the center.
4. It is always 90 degrees.

Correct Answer: It is equal to half the angle subtended by the chord at the circumference.

Solution:

The angle formed by a tangent and a chord is equal to half the angle subtended by the chord at the circumference.