Angle-Angle (AA) Triangle Similarity Checker

Quickly determine if two triangles are similar based on the Angle-Angle (AA) Similarity Postulate. Just enter two angles for each triangle!

Tip: According to the Angle-Angle (AA) Similarity Postulate, if two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar.

Triangle 1

Angle 1 (°):

Angle 2 (°):

Triangle 2

Angle 1 (°):

Angle 2 (°):

Similarity Result:

Triangle Visualization

Note: Triangles are not drawn to scale and are for visual representation only.

Understanding Angle-Angle (AA) Similarity

The Angle-Angle (AA) Similarity Postulate is a fundamental concept in geometry that helps determine if two triangles are similar. Similarity in triangles means that the triangles have the same shape, but can be different sizes. More formally, two triangles are similar if their corresponding angles are congruent and the ratios of their corresponding sides are equal.

According to the AA Similarity Postulate:

If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar.

How to use this tool:

Enter the measure of two angles for Triangle 1 in the respective input boxes.
Enter the measure of two angles for Triangle 2 in their respective input boxes.
Click the "Check Similarity" button.
The tool will evaluate if the triangles are similar based on the AA Postulate and display the result.
A visual representation of the triangles (not to scale) will also be shown for better understanding.

Example:

Suppose Triangle ABC has angles ∠A = 50° and ∠B = 70°, and Triangle DEF has angles ∠D = 50° and ∠E = 70°. Since two angles of Triangle ABC are congruent to two angles of Triangle DEF, we can conclude that Triangle ABC is similar to Triangle DEF by AA Similarity.

This tool is designed to quickly verify triangle similarity, making it an excellent resource for students, educators, and anyone working with geometry.