Symmetries can help us draw conclusions about congruent shapes. Here are definitions about congruence and congruent shapes. If two shapes coincide, then the shapes are congruent. - If parts (sides, angles) of shapes coincide, then the parts are congruent.
2. Make some conjectures about properties of quadrilaterals. Your conjectures should be about angles, segments, diagonals, parallels, or other attributes of the shapes. Use symmetry as a tool to justify two of your conjectures.