Question 78271
Is it possible for the trapezoid to have exactly one [interior] obtuse angle? yes or no? if yes, draw.  If no, explain.
<pre><font size = 6><b>
The trick is to draw a trapezoid with 
two interior right angles.  Then one 
of the remaining two interior angles
will be acute and the other obtuse. 

Here's an example:

A_____________B
|90°      120°\
|              \
|               \
|90°          60°\C
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Edwin</pre>