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True. If all sides are congruent, and each angle is 90 degrees(keep in mind that in a four sided polygon, it adds up to 360), then the polygon is a square. All the square's sides will be proportional to each of the other squares sides, which makes it similar.
For example, if one square has a side length of 2, and another has a side length of 4, then the proportion would be 2\4, or 1\2. Since each side is congruent, then each side would be proportional. If you are proving, the squares diagonal, then the square, then it would be still proportional. Remember it would be a 45-45-90 triangle, with two angle bisected, and one left alone. 45-45-90 triangles are equal to the proportion x-x-x \/(2) (square root of two). So 2\/2 would be proportional to 4\/4 proving that any combo in a square would make it similar.
I hope this helps :D
-AnonymousSaber
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Are all squares are similar true or false?
True
Is All isosceles triangles are similar true or false?
false
All equilateral triangles are similar true or false?
True as true can be.
All squares are rectangles?
False.
Parallelograms are squares is that sometimes always or never true?
Parallelograms are squares is sometimes true. Squares are parallelograms is always true. Rhomboids are parallelograms is also always true. So not all parallelograms are squares but some are.
