geometry
posted by crystal .
Can a parallelogram have four acute angles justify your answer.

geometry 
helper
Sum of measures of interior angles of a polygon of n sides = (n  2)*180 deg.
parallelogram = 4 sides
so, n = 4
(4  2)*180
2*180 = 360 deg in a parallelogram
can you answer this now? 
geometry 
crystal
the answer is yes

geometry 
Reiny
No, you cannot have 4 acute angles
since "acute" means less than 90°
4 x (something less than 90) < 360
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