Arrange 12 toothpicks on your desk to form the shape shown below.
Warm-Up Challenges
- Remove two toothpicks to leave exactly four congruent triangles.
- Remove two toothpicks to leave three congruent triangles and two congruent parallelograms.
- Remove two toothpicks to leave two congruent triangles and two congruent parallelograms.
- Remove two toothpicks to leave exactly three congruent triangles and a parallelogram.
Make a sketch of each solution you discover on the back of this paper. There may be more than one way to solve a challenge.