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How much obtuse angles does a rectangle have?
It has none because a rectangle has 4 equal interior angles of 90 degrees
How many angles does a parallelgram have?
a parallelogram has 4 angles it is pretty much a rectangle that is tilted
How do you prove that each of four angles of a rectangle is a right angle?
From Wikipedia: "...a rectangle is any quadrilateral with four right angles". So there isn't much to prove, that's how the rectangle is defined.
How can you prove that a rectangle is really a rectangle?
In a rectangle, all the opposite sides, and angles are congruent to each other. All 4 angles of the rectangle, are right angles.
All of the angles of a quadrilateral are congruentcan the quadrilateral be a pallegram?
It will always be one. If all angles are congruent, there will be four right angles, forming a rectangle. A rectangle is also a parallelogram.It will always be one. If all angles are congruent, there will be four right angles, forming a rectangle. A rectangle is also a parallelogram.It will always be one. If all angles are congruent, there will be four right angles, forming a rectangle. A rectangle is also a parallelogram.It will always be one. If all angles are congruent, there will be four right angles, forming a rectangle. A rectangle is also a parallelogram.
