## Parallelograms

Opposite sides of a parallelogram have the same length and are, obviously parallel. Th means that for a parallelogram ABCD as shown below,and

If A, B and C are the points (2,3), (4, 7) and (9,10) respectively, thenand

so

Hence

Opposite sides of a parallelogram have the same length and are, obviously parallel. Th means that for a parallelogram ABCD as shown below,and

If A, B and C are the points (2,3), (4, 7) and (9,10) respectively, thenand

so

Hence