Angle Addition Postulate

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

Angle Addition Postulate
The angle addition postulate states that if D is in the interior of ∠ABC then ∠ABD + ∠CBD = ∠ ABC

The following diagram gives an example of the Angle Addition Postulate. Scroll down the page for more examples and solutions.

Angle Addition Postulate and Angle Bisectors

1. How to use the Angle Addition Postulate to find unknown angle measures.
   
2. How to use angle bisectors to find unknown angle measures.
   

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