Triangle Formulas, Lessons and Links

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Related Links:Triangles | Triangle Types
Free Triangle Worksheets Online Triangle Calculator (Finds all sides/angles and draws downloadable image of triangle)

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Interior Angles of A Triangle:	Triangle Inequality Theorem
Relationship Between Sides and Angles
Remote Interior Angles	Area of Triangle (conventional Method)
Area of Triangle (Heron's Formula)	Area of Triangle (SAS Method)

Formulas that Involve Right Triangles

Sine Ratio

Cosine Ratio

Tangent Ratio

Pythagorean Theorem (Lesson on how to use it)

Geometric Mean (For Right Similar Triangles )