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Answered 2011-07-12 17:22:24

No because it could be a right angled trapezoid.

A rectangle must have four right angles.

Yes, a parallelogram with a right angle is always a rectangle. In fact, in my geometry book, some 55 years ago such was the definition of rectangle.

A parallelogram with one right angle will always have four right angles.

The right angled trapezoids that are not rectangles are not parallelograms.

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No because it could be an irregular quadrilateral that includes a right angle. A rectangle has four right angles.Yes, a parallelogram with a right angle is always a rectangle. In fact, in my geometry book, some 55 years ago, such was the definition of rectangle.A parallelogram with one right angle will always have four right angles.It is true that you can draw an irregular quadrilateral with a right angle which is not a rectangle but the figure will not be a parallelogram.


A parallelogram with one right angle has four of them. The name for this figure is a rectangle.


A rectangle (note that a square is a rectangle) hi


A parallelogram with a right angle is a rectangle.


A rectangle is a parallellogram with one right angle; A parallelogram is a quadrilateral with opposite sides equal and parallel.


If you mean if one of the angles is a right angle, then yes, because a rectangle is the only option left if it is to remain a parallelogram.


Definition I was taught: "A rectangle is a parallelogram with one right angle" Sounds weird but when you think it out, having one right angle in a parallelogram means the other three must be right as well.


If a parallelogram has a right angle it is a rectangle.


Yes, a rectangle is a special kind of parallelogram - one that has a right angle. (You can prove that if it has one right angle all angles are right.)


Not normally but in the shape of a rectangle it has 4 right angles.


not all parallerogram have right angle only square and rectangle have right angle


Yes, that is what is rectangle is. One can prove that all of the angles are right angles.


A parallelogram with at least one right angle


Rectangle, possibly a square. Definition of rectangle is "parallelogram with one right angle". Think about that and you'll realise that all angles thus have to be right.


Yes. If it has ONE right angle, then ALL four angles are right angles.


No, a parallelogram has no right angles.Additional answerIt might do. It could be a square or a rectangle. These are both forms of parallelogram. But it cannot have just one right angle. It either has four or none.


* Right triangle * square * rectangleA Right triangle, a parallelogram, a rectangle, a rhombus, a square and a diamond.


no only 2acute angle n 2 obtuse angle A right angle would make it a rectangle - still a parallelogram but a special one with a specific name.


A rectangle. Since it has two pairs of lines of identical length, then there is no way to have one right angle without all four being right angles (unless you change the lengths and then it is not a parallelogram). If you have four right angles, then you have a rectangle.


Every parallelogram has 4 sides.If it has 4 right angles, then it's a rectangle.(Actually, a parallelogram with one right angle must be a rectangle.)


All the angles of a rectangle are right angle. This is not necessarily true of a parallelogram. There are many other differences that arise from this difference.


It's a rectangle. (And that includes the possibility of a square).The answer would be the same if you only said "... a parallelogram with a right angle."


Yes, a rectangle is defined as a parallelogram with one right angle.


yes- a rectangle is defined to be a parallelogram with one right angle.


A right angle. Otherwise it would be a rectangle. Also, no more than 179 degrees.



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