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if a quadrilateral has three right angles will also have have a fourth right angle. Making it a rectangle. The addition of all the angles in a triangle is 360 degrees. If there are three right angles, and you subtract their addition by 360, you will get ninty degrees.
A parallelogram with at least one right angle
any regular quadrilateral will have at least one pair, this includes, but is not limited to, square, rectangle and parallelogram
No, a quadrilateral does not necessarily have any right angles. If it has a right angle, it will necessarily have four right angles, and will be a rectangle. But not all quadrilaterals are rectangles. As long as a polygon has four sides, it is a quadrilateral. It might have, for example, two angles of 100o and two angles of 80o.
a square
Yes
It could be a kite, an arrowhead or an irregular quadrilateral with a right angle - which has no specific name.
Any quadrilateral in which at least one (and therefore at least two) angles are not right angles is not a rectangle. The majority of these do not have a specific name.
if a quadrilateral has three right angles will also have have a fourth right angle. Making it a rectangle. The addition of all the angles in a triangle is 360 degrees. If there are three right angles, and you subtract their addition by 360, you will get ninty degrees.
A rectangle or a square.
No.
Not possible... The internal angles of a quadrilateral always total 360. If you MUST have an angle of 90 degrees - the remaining angles must total 270. At least one of the remaining angles will always be obtuse.
A parallelogram with at least one right angle
Here is how the word, "Rectangle" is broken down: 'Rect' is from the German for 'Right', which in geometry means 90 degrees. And angle is just angle. Together the are 'Rectangle. All 4 angles in a rectangle or 'right', or 90 degrees.
any regular quadrilateral will have at least one pair, this includes, but is not limited to, square, rectangle and parallelogram
No, a quadrilateral does not necessarily have any right angles. If it has a right angle, it will necessarily have four right angles, and will be a rectangle. But not all quadrilaterals are rectangles. As long as a polygon has four sides, it is a quadrilateral. It might have, for example, two angles of 100o and two angles of 80o.
a square