I assume that by square corners you mean 90 degree angles. if this is the case then there are 2 in a pentagon. Hope I helped :)
All u would have to do is add 114 to 342 to see if she's correct
5 tenths as a fraction is 5/10 and 5 tenths as a decimal is 0.5
-<em>Rhear</em>
If A is acute, then all obtuse angles formed are supplementary.
