### Tangents and secants may intersect on the circle, or outside the circle. When they intersect they form an angle, and enclose arcs. But they also get broken into adjacent segments. Would you be able to figure out the measure for those segments. By the way do you think that is possible to have a tangent and a secant intersecting at the interior of the circle? The lesson is extended to intersecting chords. Would be possible to have a chord and a tangent intersecting? A great option throughout the lesson is that you will have the space to solve very similar problems on the screen with the marker tools menu and your stylus.

** Lesson's Content **

** Lesson's Glossary **

**Center of a circle **

The point that all points in the circle are equidistant from.

**Central angle of a circle **

An angle whose vertex is the center of the circle.

**Chord of a circle **

A segment whose endpoints are on a circle.

**Circle **

The set of points on a plane at a certain distance (radius) from a certain point (center); a polygon with infinite sides.

** Minor arc **

An arc whose endpoints form an angle less than 180 degrees with the center of the circle.

** Major arc **

An arc whose endpoints form an angle over 180 degrees with the center of the circle.

**Radii **

Plural form of radius.

Radius

The segment whose endpoints are any point on a circle or sphere and its center; the length of that segment.

**Secant to a circle **

A line that intersects the circle in two points.

**Semicircle **

An arc whose central angle is a right angle.

** Tangent to a circle **

A line that intersects the circle in just one point, called point of tangency.

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