Course: H.S. Precalculus: Trigonometry



Derive the formula A = 1/2 ab sin(C) for the area of a triangle by drawing an auxiliary line. Use the formula to find areas of triangles.

I Can Statements Academic Vocabulary

*I can derive the area formula for a triangle using the sine ratio.

*I can determine the area of a triangle given a variety of information.

Auxiliary line

Looking Back Looking Ahead

*Apply the area formula for a triangle. (MA.5.M.3)

*The concepts and skills in this standard are an integral part of calculus, college-level algebra, and beyond.

Clarifying Examples and Digital Resources
Click here for clarifying examples and digital resources aligned to Indiana standards. These are intended to expand each standard to support instruction in the classroom as evidenced by the Eight Mathematics Teaching Practices put forth by the National Council of Teachers of Mathematics (NCTM).