No. Some do, but some don't.
There is no specific name, but "right-angled polygon" will suffice.
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.
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.
No. Polygons cannot have faces.
Many shapes can have right angles, including rectangles, squares, and right triangles. Additionally, some polygons, like trapezoids and certain types of irregular shapes, can also contain right angles. The key characteristic of a right angle is that it measures 90 degrees, so any shape with at least one angle that meets this criterion can be considered to have a right angle. There is no specific limit to the number of shapes that can possess right angles, as they can be found in both regular and irregular forms.
No because it can only contain a right angle and two acute angles
equilateral, isosceles, right angle and scalene
No
when you measure polygons that use right angles, like squares or rectangles.
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.
A polygon that does not have a right angle is a triangle, specifically an obtuse triangle, which has one angle greater than 90 degrees. Additionally, any polygon with angles that are all acute (less than 90 degrees), such as an equilateral triangle or a regular pentagon, also does not contain a right angle. Therefore, there are numerous polygons, including various types of triangles and other shapes, that can be defined without a right angle.
right angle