In this activity you have two sliders: a purple slider for the angle A and a green slider for side AB. Adjust the sliders one at a time. [br][br]Note which slider changes the shape and size of the triangle. [br]Then notice which slider changes only the size of the triangle thus forming similar triangles. [br]Notice what happens to the trig ratio result when you move each slider.

Adapted from Trigonometric Ratios by ayoob http://www.geogebratube.org/material/show/id/12100