Learn the essential definitions of the parts of a circle. A secant line to a circle is a line that crosses exactly two points on the circle while a tangent line to a circle is a line that touches exactly one point on the circle. A chord is a line that has its two endpoints on the circle.
A central angle is an angle made at the center of a circle by two radius of the circle. An inscribed angle is an angle made at the circumference of the circle by two chords of the circle.
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What is a central angle of a circle
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