Posted by **Callie** on Friday, January 20, 2012 at 9:00am.

True or False. A quadrilateral with these following vertices is a parallelogram.

(-4,-3),(2,-3),(4,-6),(-4,-6)

- Math -
**Steve**, Friday, January 20, 2012 at 11:20am
Calling the points ABCD,

slope of AB = 0

slope of CD = 0 so AB || CD

slope of BC = -3/2

AD is vertical

so BD not || to AD

no parallelogram - it is, however, a trapezoid.

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