To verify that the sum of the angles of a triangle is 180°, you can use a simple geometric method involving parallel lines. Here's a step-by-step activity you can conduct:
### Materials Needed:
- A triangle (can be drawn on paper or made with a ruler and compass)
- A ruler
- A protractor
- A piece of paper
### Steps:
1. **Draw a Triangle**:
Draw a triangle, label its vertices as A, B, and C.
2. **Label the Angles**:
Label the angles