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If a parallelogram has one right angle then all of its angles must be right?
Wiki User
∙ 14y ago
Yes. This is true because opposite angles are congruent and adjacent angles are supplementary.
Wiki User
∙ 14y ago
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A rectangle is a parallelogram with what 4 sides angles?
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 then it is a rectangle?
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.
A quadrilateral with one right angle must be a rectangle true or false?
FALSE because a rectangle has 4 right angles.
Which of these figures must be a rectangle?
A parallelogram with at least one right angle
In a parallelogram with angles LMNO where L equals 32 degrees what does the adjacent angle O equal?
For angle L, the adjacent angle o, and its opposite angle M, are both 158 degrees. (it's a rhomboid) In a parallelogram, adjacent angles total 180 degrees (they are supplementary), since the opposite angles must be the same and there are two of each.
What is the name of a parallelogram with only one right angle?
No parallelogram can have only one right angle. The consecutive angles of a parallelogram must be supplementary, meaning they must add up to 180. 180-90=90, so all the angles must be right angles.
What is a parallelogram with 1 right angle?
A parallelogram cannot have just one right angle. If it has one, all four of its angles must be right angles and so it must be a rectangle (or, as a special case, a square).
What is a parallegram with 4 sides with 4 right angles?
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.)
A rectangle is a parallelogram with what 4 sides angles?
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 then it is a rectangle?
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.
A quadrilateral with one right angle must be a rectangle true or false?
FALSE because a rectangle has 4 right angles.
Can a parallelogram have 2 right and 2 acute angles?
No, a paralleogram that has even one right angle must have all right angles in order to keep the opposite sides parallel. So, a parallelogram will have either no right angles (in which case it will always have 2 acute angles and two obtuse angles) or it will have 4 right angles (in which case it will be called a square or a rectangle, and will obviously have no acute or obtuse angles).
How many angles must measure 90 degrees in a parallelogram?
It is not a requirement that any of the angles are right angles (90 degrees), to qualify as a parallelogram.
What is a parallelogram with 4 right angles called?
A rectangle, possibly a square. Can you see why a parallelogram must be a rectangle if any one of its angles is right?
What geometric shape has 2 acute angles and obtuse angles?
a trapezoid :) * * * * * Not necessarily. A trapezoid can have two right angles, one acute and one obtuse angle. A parallelogram which is not a rectangle must have 2 acute and 2 obtuse angles.
A parallelogram must have in order to beclassified as a rectangle?
4 right angles
What angles make a right triangle?
One angle must be 90o, which is the right angle. The sum of the other two angles must equal 90o.
