# Properties of Parallelograms

### Chapter 6.2

## Theorem 1

Angles of a polygon that share a side are consecutive angles. A parallelogram has opposite sides parallel. Its consecutive angles are same-side interior angles so they are supplementary. In *ABCD*, consecutive angles *B* and *C* are supplementary, as are consecutive angles *C* and *D*.

Find
| ## Solve for x2x-10=65-x. First you Add to 2x since it's a negative X-10=65. Then you add 10 to 65 to solve. X=75 It's solved after dividing 75 to x. |