An EQUILATERAL TRIANGLE
No it is impossible, only quadrilaterals have all side that are equal and or all right angles, like a square or a rectangle.
Dodecagon is the name for the regular 12 sided polygon, meaning that all its side lengths and angles are the same. Not sure if there is a name for a general 12 sided 2d shape.
If all side lengths are changed so the new shape is proportionately equal, the angles don't change. But if it's not proportion. equal, then the angles will be different
regular pentagon maybe maybe not
Rectangle.
No it is impossible, only quadrilaterals have all side that are equal and or all right angles, like a square or a rectangle.
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°.
A square? a quadrilateral is any four sided shape with four angles.
The interior angles in a quadrilateral (4 sided shape) add up to 360 degrees.
The answer depends on what shape the question is about.
It is an isosceles triangle
Dodecagon is the name for the regular 12 sided polygon, meaning that all its side lengths and angles are the same. Not sure if there is a name for a general 12 sided 2d shape.
Isoceles Triangle
If all side lengths are changed so the new shape is proportionately equal, the angles don't change. But if it's not proportion. equal, then the angles will be different
regular pentagon maybe maybe not
it has to have equal angles, not side lengths. otherwise it would just be two of the same shape
Rectangle.