Finding angles involving tangents and circlesIn this lesson, we will look at finding angles in diagrams that involve tangents and circles. Some of the theorems used are Tangent to Circle Theorem, Pythagorean Theorem and Two-Tangent Theorem.
Example : In the following diagram, PA and PB are tangents to the circle. Find the value of: e) the length of OP , given PB = 7 cm. Solution : 
The following video shows how to find angles in diagrams involving tangents and circles. This video provides example problems of determining unknown values using the properties of a tangent line to a circle. This video shows how to solve for unknown values using the properties of tangent segments to a circle from a given point.
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