square?
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EQUILATERAL triangle. Two sides the same length , and two angles equal is ISOSCELES Triangle A triangle with a Right-Angle is a RIGHT -ANGLED Triangle No equal sides/angles is a SCALENE triangle.
This is a 21 sided polygon and therefore has 21 angles. NOTE : The name supplied for this polygon is an artificial name and never used in practice. General usage refers to this shape as a 21-gon.
Providing that it is a regular polygon then it is a nonagon which has 9 sides
I don't know if there's a specific name for these two shapes, but the only two shapes that have 4 equal sides are the square and rhombus. The difference between the two is the square has 4 equal angles (90 degrees) and a rhombus does not.
It is impossible to have a six sided shape with right angles since the lines would never meet, therefore it would not create a shape. The most right angles you can have in a shape is four. A six sided shape is called a hexagon. There are Regular Hexagons, meaning all the sides and all the angles are equal. Any other Hexagon with unequal sides and angles and called Irregular Hexagons. Each side must be straight, and the sum of the angles equaling 720°.