G.CO.11

Prove theorems about parallelograms. Theorems include: opposite sides are congruent, opposite angles are congruent, the diagonals of a parallelogram bisect each other, and conversely, rectangles are parallelograms with congruent diagonals.

1.		Shape Up! 16 - calculate value of x, angle sum of quadrilateral, algebraic expression
2.		Shape Up! 15 - calculate angle size, parallel line properties
3.		Shape Up! 13 - calculate angle size, parallel line properties
4.		Shape Up! 12 - calculate angle size, angle sum of a quadrilateral, algebraic expression