Q: Which shape has less than 4 sides has a right angle and is not a quadrilateral?

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a ploygon or quadrilateral

No because a quadrilateral has 4 sides whereas a triangle has 3 sides.

It is an irregular quadrilateral. It cannot have any parallel sides.

A four-sided shape with one right angle is a quadrilateral. There is no more specific term, unless it has more than one right angle or has equal sides.

If a shape has four sides and you know that it has one right angle, yet you do not know anything else about the shape, then the most specific geometric term you can assign to the shape is "quadrilateral". Unless you know about the other angles and side lengths, nothing more can be said.

Related questions

a ploygon or quadrilateral

No because a quadrilateral has 4 sides whereas a triangle has 3 sides.

It is a parallelogramIf one of the angles is a right angle (then they all are) and the quadrilateral is a rectangle.If both pairs of sides are equal in length (but none of the angles is a right angle) the quadrilateral is a rhombus.If the sides are equal and one of the angles is a right angle, the quadrilateral is a square.

No... a quadrilateral is a figure of 4 sides. Trapzoid, square, diamond.... get the picture? A right angle is an angle. It is formed by two lines intersecting. They don't even necessarily make a shape.

It is an irregular quadrilateral. It cannot have any parallel sides.

It could be a kite, an arrowhead or an irregular quadrilateral with a right angle - which has no specific name.

no a quadralateral shape is simply a shape with 4 sides. (quad means 4)

A four-sided shape with one right angle is a quadrilateral. There is no more specific term, unless it has more than one right angle or has equal sides.

A Square and Rectangle are both a Quadrilaterals(A four sided shape)and have both have 4 Right Angles.In addition,a irregular Quadrilateral(A four sided shape of no sides of the same length)may have a right angle( A 90 degrees angle)but it depends on how you draw it on paper.Cretth 2010

If a shape has four sides and you know that it has one right angle, yet you do not know anything else about the shape, then the most specific geometric term you can assign to the shape is "quadrilateral". Unless you know about the other angles and side lengths, nothing more can be said.

Four SIdes

there is no unique name for a shape like that as it would just be called an irregular quadrilateral