Final answer:
If one angle of a parallelogram is a right angle, then all other angles are right angles.
Step-by-step explanation:
If one angle of a parallelogram is a right angle, then all other angles are right angles.
To prove this, we can use the properties of a parallelogram.
- Since opposite angles in a parallelogram are congruent, if one angle is a right angle, then the opposite angle is also a right angle.
- Similarly, since consecutive angles in a parallelogram are supplementary, if one angle is a right angle, then the adjacent angle is also a right angle.
Therefore, if one angle of a parallelogram is a right angle, all other angles are right angles.
Learn more about Parallelogram angles