Question

Select the statements that are true.

• A. The tangent at any point of a circle and the radius through this point are perpendicular to each other.
• B. The tangent at any point of a circle and the radius through point are not perpendicular to each other.
• C. A straight line which intersects a circle at 2 points, is called the secant.
• D. All of the above

Answer 1

Answer: (A), (C)

The correct options are
A

The tangent at any point of a circle and the radius through this point are perpendicular to each other.

C

A straight line which intersects a circle at 2 points, is called the secant.

$\Rightarrow$ In the figure, AB is a tangent at point B.

$\Rightarrow$ The tangent at any point of a circle and the radius through this point are perpendicular to each other.

$\Rightarrow$ A straight line (EF) which cuts a circle at 2 points is called the secant of the circle.