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Mathematics / Triangles

Mathematics / Triangles

A triangle is one of the basic shapes of geometry. It is a polygon with 3 sides and 3 vertices/corners.

Two triangles are said to be similar if their angles are equal and their corresponding sides are proportional.

In order to prove that two triangles are similar, it is sufficient to prove either of the following conditions:

• AAA(Angle-Angle-Angle) - If 3 angles of the two triangles are correspondingly equal then the two triangles are similar
• AA(Angle-Angle) - If 2 angles of the two triangles are respectively equal then the two triangles are similar
• SSS(Side-Side-Side) - If the corresponding 3 sides of the two triangles are in proportion then the triangles are similar Lessons
Topics
Lessons
Topics
• Introduction to Triangles
• Understanding Similar Polygons
• Similarity of Triangles and their Properties
• Criteria for Similarity of Triangles
• Areas of Similar Triangles
• Pythagoras Theorem
• Review of Triangles
• Some Basic Results on Proportionality
• Internal and External Bisectors of an Angle of a Triangle
• More on Basic Proportionality Theorem
• More on Characteristic Properties
• Triangle -- Summary

Learnhive Lesson on Triangle

• Accessed by: 124 Students Similarity of Triangles -- Summary

Learnhive Lesson on Similarity of Triangles

• Accessed by: 124 Students