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.
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Isometric shape
Well if two triangles have sides of the same length, then by SSS they are congruent. In addition, if they have sides of the same length, their perimeters would be the same. So at first it seems like the answer would be yes. However, if is easy to come up with two triangles with the same perimeter whose sides do not have the same length Triangle 1 has sides 10, 15 and 30 to know if this is a triangle, we need the length of any side to be less the sum of the other two sides. So 10
The perimeter is the sum of all four sides; in a square, all four sides have the same length. Therefore, you simply need to divide the perimeter by 4.
To be called a square, a figure must not only have 4 sides, but also some additional properties. Specifically, in a square:All 4 sides have the same length.All angles are right angles.
A regular polygon.