Triangles

Triangles - Basic Introduction, Geometry

Types of Triangles

Types of Triangles – Definitions, Properties, Examples – Full

3-4-5 Triangles, Definition, Rule & Angles - Lesson

Triangles in Geometry - Definition, Shape, Types, Properties

Special right triangles review (article)

Illustrative Mathematics

Triangles in Geometry (Definition, Shape, Types, Properties

Use ratios in right triangles (practice)