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

Angles in a Circle

This episode deals with angles formed with vertices outside the circle.

Learn how two types of secants form angles.

Learn how to solve problems for secants and arcs.

A secant is a line, ray, or line segment that intersects a circle in two places.

Three points are covered:

(1) secants that intersect in a circle which divide each other proportionally,

(2) the angle formed by secants which intersects in a circle and is half the sum of the intercepted arcs,

and (3) two secants drawn from the same point outside a circle that form an angle whose measure is half the difference of the intercepted arcs.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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