Question 21
What is the least number of toothpicks you can use to form 4 triangles?
You may build in three dimensions. Use unbroken equal toothpicks as whole triangle sides, joining at endpoints; count triangular faces, not triangles created by crossing sticks.
You may build in three dimensions. Use unbroken equal toothpicks as whole triangle sides, joining at endpoints; count triangular faces, not triangles created by crossing sticks.