Your teacher will assign you one of the three triangles. You can use the picture to draw copies of the triangle on tracing paper. Your goal is to find a tessellation of the plane with copies of the triangle.

1. Can you make a tessellation of the plane with copies of the trapezoid? Explain.
2. Choose and trace a copy of one of the other two quadrilaterals. Next, trace images of the quadrilateral rotated 180 degrees around the midpoint of each side. What do you notice?
3. Can you make a tessellation of the plane with copies of the quadrilateral from the earlier problem? Explain your reasoning.