equilateral triangle
An internal angle of the polygon.
A rhombus
A shape with all angles greater than a right angle is called an obtuse polygon. The simplest example of such a shape is an obtuse triangle, which has one angle greater than 90 degrees. Additionally, any polygon with all angles exceeding 90 degrees, such as a convex polygon with obtuse angles, fits this description.
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.
Any polygon can have a right angle. A right angled triangle is an example.
Any polygon with 4 or more sides can always have a right angle.
polygon
While an octagon may contain right angles, the shape itself is not an angle but a polygon.
An internal angle of the polygon.
A rhombus
The equation for the size of an interior angle of an n-sided regular polygon is (n-2)180/n. When n=7, the interior angle of a regular sided shape would be 5x180/7 or approximately 128.57. The polygon in the question has an interior right angle (90 degree angle) and thus cannot be a regular shape. A 7 sided shape is called a heptagon. Thus, the shape described in the question is an irregular heptagon.
A shape with all angles greater than a right angle is called an obtuse polygon. The simplest example of such a shape is an obtuse triangle, which has one angle greater than 90 degrees. Additionally, any polygon with all angles exceeding 90 degrees, such as a convex polygon with obtuse angles, fits this description.
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.
Any polygon can have a right angle. A right angled triangle is an example.
Any polygon, if it is not regular, can have 1 right angle.
A right angle triangle
There is no polygonal shape which has exactly those angles. It is possible for a concave polygon with 6 or more vertices to have the given angles.