# Page 2 on 7.3: Triangle Similarity

- Author:
- Leah Anderson, Tim Brzezinski

- Topic:
- Geometry, Similar Triangles, Triangles

In the applet below, there are 2 triangles. The three sides of one triangle are proportional to the three sides of the other triangle. You can adjust the scale factor (

*k*) and the side lengths of the original triangle with the sliders above. Interact with the applet below for a few minutes, then answer the questions that follow.**Questions:**1) What is true about the angles of the two triangles? (If you haven't done so already move the slide me slide!) 2) What can you conclude about the two triangles? 3) Complete the following in your 7.3 Triangle Similarity Postulate/Theorems for Side Side Side (SSS~) in your handout or KiN by filling in the blanks:

**If 3 _________________ of one ____________________ are in ___________________ to 3 ______________________ of another __________________, then those _______________**

*are _________________.*