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Answered 2011-02-19 14:51:00

No. There are quadrilaterals that have no right angles.
no,what about a trapizoid or rhombus

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Do all irregular quadrilaterals have no right angle?

No you can have one right angle and the others not right angles and still be and irregular quadralateral



Do all irregular quadrilaterals have no right angels?

A kite can have on right angle, even two!


Does all Quadrilaterals have at least one right angles?

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.


Do all quadrilaterals have at least one right angels?

no,what about a trapizoid or rhombus


Do all parallelograms have at least one right angle?

The simple answer is no, not all parallelograms have at least one right angle. However, there are some that do. Rectangles and squares are 'special' parallelograms that all have at least one right angle.


Do all triangles have at least 1 right angle?

only right tringles or HL triangles have at least 1 right angle


Do all quadrilaterals have at least one right angle true or false?

False because it depends on what type of a 4 sided quadrilateral it as for example a square has 4 right angles whereas rhombus has no corner right angles.


Which is not a quadrilateral a rhobus a rectangle a right triangle or a trapezoid?

It is the right angle triangle which has 3 sides whereas all quadrilaterals have 4 sides.


What polygon has 1 right angle and only 1 set of parallel lines?

There are lots of polygons like that. If by 1 right angle, you mean exactly 1 right angle, there are no such quadrilaterals, but there are pentagons (in fact n-gons for all n>=5.)



Do all quadrilaterals have at least one line of symmetry?

Not all 4 sided quadrilaterals have lines of symmetry.


Why is the angle sum of a trapezoid 360?

Because the angle sum of all quadrilaterals is 360 degrees.


Do all quadrilaterals have at least one pair of curved sides?

No, because all quadrilaterals have 4 straight sides.


What Quadrilaterals equal 360 degrees?

All polygons with four angles (quadrilaterals) have a inner angle sum of 360 degrees.


Does all irregular Quadrilaterals have no right Angles?

Not always because its possible to have a trapezoid with 2 right angles and an obtuse angle plus an acute angle and the 4 interior angles must add up to 360 degrees


Can a square have at least 1 right angle?

A square has to have all 4 right angles, by definition


Do all quadrilaterals have have four right angles?

no, because a octagon is a quadrilaterals and they have 8 angles


Which quadrilateral always have a 90-degree angles?

The only quadrilaterals that always have all four right angles are the square and the rectangle. All four angles in a quadrilateral must add up to 360 degrees.It is possible to have non-regular quadrilaterals with one or two right angles. A quadrilateral with three right angles becomes either a square or a rectangle, because its fourth angle must also be a right angle.


What is the exterior angle sum of a quadrilateral?

360o All polygons, not just quadrilaterals have an exterior angle sum of 360o.



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