1. Measurement – Right Angled Triangles By the end of this lesson you will be able to identify and calculate the following: 1. The Tangent Ratio

2.  The tangent trigonometric ratio for any right- angled triangle is defined:  This is abbreviated to:

3.  The value of this ratio for any angle can be calculated by measuring two specific side lengths of the right-angled triangle containing that angle and dividing them.

11. Note: if you get the wrong answer check your calculator is set to degrees.