
[mathlearn] Question about unknown angle in a Parallelogram.
Posted:
Oct 10, 2011 10:42 PM



Okay... This has me stumped!
I have a Parallelogram constructed from 4 intersecting lines, with the following internal angles: X, X and (180  X)
The angle opposite (180  X) is not given.
Since I can employ Corresponding, Alternate Interior and Exterior angles to this figure, is it safe to assume I could employ the "Exterior Angle Theorem" to produce:
(180  X) = 2X
Thus... giving me X = 60 degrees?
Thoughts?
Jon

