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A right triangle or a rectangle are polygons that have at least one right angle. There are other quadrilaterals and many irregular polygons that could have at lease one right angle, too. Many of them. Note that a polygon is any planar figure constructed of a finite number of line segments to make a closed figure. By that definition, which is a correct one, the triangle and rectangle are polygons. And a quadrilateral (of which the rectangle is special case) can be constructed with just one right angle, though it will be a bit quirky looking. Once we start adding sides to make different polygons, the game is afoot because so many possibilities exist.

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0There is no specific name, but "right-angled polygon" will suffice.

Any polygon, if it is not regular, can have 1 right angle.

A right angle triangle

The answer to this would be any acute polygon, such as an equilateral triangle. The definition of acute polygons is that no angle in the polygon is greater than or equal to 90 degrees.

Any polygon can have just one right angle, from a right angled triangle upwards.

Any polygon can have one right angle, for example, a right angled triangle.

There is only one regular polygon which contains right angles - this is a square. None of the other regular polygons from 3 sides and upwards has a right angle.

right-angle triangle has at least one right angle .

A polygon with 4 or more sides can have more than 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.

how do you draw a quadrangle that has at least 1 right angle.

An irregular septagon: the right-angle will prevent it being regular.

A polygon is pretty much any enclosed shape constructed of straight line segments connected end to end. The angles do not have to be right. In fact, they usually aren't. A right angle would NEVER be a polygon, as it is just one right angle. In Euclidean geometry a right angle must be accompanied by two acute angles to form a triangle--the polygon with the smallest number of sides.

An isosceles right angle triangle fits the description

Many shapes have a right angles. For example, a right angled triangle, square or rectangle all contain at least one right angle. Trapeziums may also contain right angles. Any irregular polygon may also contain a right angle.

It must have at least one internal angle which is a reflex angle - that is, between 180 and 360 degrees.

it wouldn't be a rhombus if it had a right angle.

A right angle triangle

Any polygon with more than three sides may have an angle greater than 180 degrees.

Any polygon can have at least one right angled - for example a right angled triangle. An example of an irregular polygon with only right angles is a rectangle.

A regular polygon has all its angles equal AND all its sides equal. A nonregular polygon has at least one angle or one side that is different from the others.

Polygons can be classified in a number of ways. A convex polygon is one in which a straight line joining any two points inside the polygon lies wholly inside the polygon. One consequence is that all its interior angles are less than 180 degrees. A concave polygon is one in which at least one angle is a reflex angle (> 180 deg). Generally, a polygon may be assumed to be convex unless otherwise specified. A regular polygon is one in which all the sides are of equal length AND all the angles are of equal measure. An irregular polygon is one in which at least one side is of a different length from the others OR at least one angle is of a different measure from the others. Polygons can have three or more sides. There is no limit to the number of sides that a polygon may have. The interior angle of a polygon is pre-determined only if it is regular. In a regular polygon with n sides, each interior angle has a measure of 180*(n-2)/n degrees. A regular triangle [equilateral] is acute angled; a regular quadrilateral [square] is right angled and all other regular polygons are obtuse angled.

Any concave polygon. It must have at least 4 sides.

A right scalene triangle.

It is called an exterior angle.

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