# Area of Triangle using Sine

Videos and lessons to help High School students learn how to derive the formula A = 1/2 ab sin(c) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side.

Common Core: HSG-SRT.D.9

Area of a Triangle Using Sine
Derivation and practice of a new area formula for triangles using the sine function.

The Area of a Triangle using Sine
This video explains how to derive the formula and how to determine the area of a triangle using the sine function.

SAS Triangle Area Formula
Derivation and application of sas triangle area formula.

Example: Determine the Area of a Triangle Using the Sine Function
This video provides an example of how to determine the area of a triangle using the sine function.

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