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The video introduces the concept of circles, providing a brief overview of their properties and significance in geometry.

What is the primary shape discussed in the video?

• Square

• Triangle

• Rectangle

• Circle

Which of the following is a characteristic of a circle?

• It has four sides.

• It is a polygon.

• It has three angles.

• It has no corners.

What is the term used for the distance from the center of a circle to any point on its circumference?

• Diameter

• Radius

• Chord

• Tangent

Which line segment passes through the center of a circle and has its endpoints on the circle?

• Secant

• Radius

• Chord

• Diameter

What is the name of the line that touches a circle at exactly one point?

• Radius

• Tangent

• Secant

• Chord