This activity has 24 cards. Students sort them to determine if the triangles can be proven similar. If they can, which postulate or theorem can you use (AA~, SAS~, SSS~). Depending on your needs you can use 12, 18, or all 24 cards for your sort. The 12 and 18 cards sets are all triangles that can be proven similar. The 24 card set includes triangles that do not have enough information to prove or there is something incorrect (sides are not proportional).
Can also be used as Flash Cards to help student recognize when they can use each postulate/theorem. Great beginning of class activity
I have included an answer sheet for student to record their results. This makes it easier to walk around and check their work.
A key is proved for all forms of the sort.
The varying lengths for the sort works well for differentiated instruction.
For Interactive Math Notebook (or Math Journal)
I print the sort on colored sheets. Students cut out the square and decide which method can be used to prove the 2 triangles are similar. They write the answers on the back and have flash cards to study with at home. I have included a pocket for student to place their place cards in. Student glue the pocket into their math notebook and place the flash card in it for later practice.
- Bell work
- Check for understanding
- Alternative to Homework
- Extra Practice
- Activity for interactive notebook