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No, parallelograms and rectangles cannot have reflex angles. This is because
1. The sum of their interior angles must be 360 degrees.
2. Opposite angles must be equal.
3. If it were the case that a reflex angle existed, two angles would have to be greater than 180 by 2.
4. But by 1, the two angles would now sum over 360, and that cannot occur for a four-sided polygon.
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∙ 12y ago
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If one angle in a parallelogram is it a rectangle?
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.
How do you prove that a parallelogram is a rectangle?
a rectangle has four right angles and opposite sides are all the same length This means that a parallelogram is not always a rectangle, but a rectangle is always a parallelogram, by definition.
If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle?
true.
What are the 4 quadrilaterals that have 2 pairs of parallel sides?
Parallelogram, rectangle, rhombus and square.Parallelogram, rectangle, rhombus and square.Parallelogram, rectangle, rhombus and square.Parallelogram, rectangle, rhombus and square.
What do you call a angle larger than 180 degrees?
Reflex angle
Does a rectangle have a reflex angle?
You can never have a reflex angle on the inside of a rectangle. But it always has 4 on the outside.
What shapes have a reflex angle?
parallelogram
Is a rectangle reflex angle?
A rectangle is not an angle at all. It's a flat shape that looks like a box. A rectangle can never have a reflex angle inside it. But it always has four of them on the outside.
What is a parallelogram with for right angle?
A rectangle.
What shape has reflex angle and four sides?
parallelogram!
What is a Parallelogram with one right angle?
a rectangle
If one angle in a parallelogram is it a rectangle?
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.
Parallelogram are what rectangle?
A rectangle is a parallellogram with one right angle; A parallelogram is a quadrilateral with opposite sides equal and parallel.
If a parallelogram has a right angle is it a rectangle?
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.
What is the name for a parallelogram with one right angle?
A parallelogram with one right angle has four of them. The name for this figure is a rectangle.
What attribute makes a rectangle a special parrallelogram?
A parallelogram with a right angle is a rectangle.
What is the name for a parallelogram with four right angle?
Rectangle
