Yes... I think so.
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If two of the angles of a parallelogram are acute, then the other two angles will be obtuse. Since a parallelogram contains two pairs of parallel sides, both of the acute angles and both of the obtuse angles respectively will measure the same.
a trapezoid :) * * * * * Not necessarily. A trapezoid can have two right angles, one acute and one obtuse angle. A parallelogram which is not a rectangle must have 2 acute and 2 obtuse angles.
parallelogram
Any parallelogram that is not a rectangle or a square must have two obtuse angles (and two acute ones).
Yes, unless it is a rectangle and they are all right angles.