Similar triangle shortcuts

In the top left corner you can see "S". This means that your triangles will share a common side. If you click the "S", you will see other abbreviations. Go through each of these and explore a bit. What is the minimum information you think you need to prove triangles are similar? [br][br]You can drag the points in triangle ABC in order to change the triangle. You can also alter some of the points in triangle DEF.[br][br]Once you have examined all of these shortcuts, select the right arrow at the top of the screen to move to part 2 of the worksheet.

The following are several "shortcuts" to proving whether or not two triangles can be similar. Some of these shortcuts are valid, but others are invalid.[br][br]Use your knowledge of similar polygons to find the valid shortcuts. [br]Check your understanding at the bottom of this worksheet.