A parallelogram can have both ...?

Question:a. Acute and obtuse angles
b. Perpendicular lines and parallel angles
c. acute right angles
d. perpendicular lines and acute angles

Answers:
a) Is correct.
b) No such thing as parallel angles.
c) a right angle can't be acute .(an acute angle is less than 90 degrees.)
d) Impossible in a parallelogram.
Just look at it. If you know what those things even are, you'll know the answer.

And if you don't know what those are, then I guess you should pay attention in class.
a. Acute and obtuse angles
the answer is A

acute right angles ?? that's stupid
a.
a. Acute and obtuse angles

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