الزاوية المركزية

The video tutorial explains the concept of central angles in a circle, using a circle with center M and points A and B on its circumference. It describes how connecting these points with the center forms radii and a central angle. The tutorial further distinguishes between central angles, like angle SAM, and non-central angles, like angle CSD, by explaining their properties and differences.

What is the defining characteristic of a central angle in a circle?

• It is formed by two chords.

• It is always a right angle.

• Its vertex is at the center of the circle.

• It is formed by two tangents.

Which of the following is true about the angle formed by radii M-A and M-B?

• It is a tangent angle.

• It is a supplementary angle.

• It is a central angle.

• It is an inscribed angle.

How can you distinguish a central angle from a non-central angle?

• A non-central angle is formed by two radii.

• A central angle has its vertex at the center of the circle.

• A non-central angle is always larger than a central angle.

• A central angle is formed by two chords.

What is the position of the vertex in a non-central angle?

• At the center of the circle.

• Outside the circle.

• On the circumference of the circle.

• Inside the circle but not at the center.

Which of the following is NOT a property of a central angle?

• It is always equal to 90 degrees.

• It divides the circle into two arcs.

• Its vertex is at the center of the circle.

• Its sides are radii of the circle.