More Lessons for High School Math Regents

Math Worksheets

High School Math based on the topics required for the Regents Exam conducted by NYSED.

What is the Secant-Tangent Rule?

If a secant segment and tangent segment are drawn to a circle from the same external point, the product of the length of the secant segment and its external part equals the square of the length of the tangent segment.

For example, in the following diagram PC

Segments of Secants and Tangents Theorem

The segments of a secant segment and a tangent segment which share an endpoint outside of the circle. The product of the lengths of the secant segment and its external segment equals the square of the length of the tangent segment.

Demonstration of a circle geometry property

This video focuses on using the Tangent Secant Theorem to find the length of a tangent line segment. This video also reviews how to find the roots of a quadratic equation.

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