All parallelograms are rectangles. true or false

1 answer:

6 0

That's false. Not all parallelograms are rectangles, only some of them are.
If a parallelogram wants to be a rectangle, then it has to agree to have a
right angle (90 degrees) at one corner.

(I know, I know. Rectangles have right angles at ALL four corners.
But if a parallelogram has one right angle AND it's still a parallelogram,
then it turns out that all four of its angles are right angles. So if you tell
a parallelogram that one of its angles has to be a right angle, and it wants
to still be a parallelogram, then it must turn into a rectangle.)

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