Finding the Lengths of Intersecting Chords

A chord is a segment that has its endpoints on the circle. In this video, you will learn that when two chords intersect each other inside a circle, the products of their segments are equal. Click the player button to begin.

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Finding the Lengths of Intersecting Secants

A secant is a line that intersects a circle at two points. In this video, you will learn that when two secants intersect each other outside a circle, the products of their segments are equal. Click the player button to begin.

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Finding the Lengths of Intersecting Secants and Tangents

In this video, you will learn that if a tangent and a secant or if two secants intersect from a point outside of the circle, there are two useful theorems, or formulas, that relate to the side lengths of the two given segments - either tangent and secant, or secant and secant. Click the player button to begin.

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Finding the Lengths of Intersecting Tangents

A tangent is a line that intersects a circle at exactly one point. In this video, you will learn that the measure of an angle formed by a secant and a tangent drawn from a point outside of a circle is half the difference of the intercepted arcs. Click the player button to begin.

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Segment Lengths Review

Now that you have investigated segment lengths, review your knowledge in this interactivity. Click the player button to get started.