Chapter 5: Trigonometric Functions Lesson 4: Finding Area of Triangles Mrs. Parziale

Area of a Triangle – When you know the base and height: If h is not known, you can find it using right triangle trig.

Area of Triangles Example 1: Find the area of the following triangle. When you don’t know the height, but have two sides of a triangle and an included angle, you can find the area.  C is the angle between two sides a and b.

Example 2: Find the area of the following triangle.

Closure State the area of a triangle when height is not known. Given the following triangle, what steps would you take to calculate the area?