Lesson 2

The primary trigonometric ratios are only valid for right triangles, so how are problems involving oblique triangles solved? The following tool will help you discover a formula that is true for all triangles, including oblique triangles.

 

Try This 2

 

The Sine Law Explorer applet compares the ratios of sides and sines of angles. Drag the points of the triangle to change the measure of the angles and lengths of sides. Observe what happens to the ratios.

 

 

Share 2

 

Compare your observations from Try This 2 with a partner. With your partner, describe an equation or relationship that appears to be true for all triangles.

 

Place a copy of your conclusion in your course folder.