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Topic: [math-learn] Question about unknown angle in a Parallelogram.
Replies: 8   Last Post: Oct 11, 2011 9:59 AM

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Jon Wilson

Posts: 56
Registered: 9/25/05
[math-learn] Re: Question about unknown angle in a Parallelogram.
Posted: Oct 10, 2011 11:44 PM
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att1.html (12.8 K)

Okay... then how would I solve for the unknown?

Jon

--- In math-learn@yahoogroups.com, Ze'ev Wurman <zeev@...> wrote:
>
> Exterior angle theorem does not apply to quadrangles ...
>
> On 10/10/2011 7:42 PM, jjaywilson2004 wrote:

> >
> > 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
> >

>
>
>
> [Non-text portions of this message have been removed]
>






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