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
True
false
True as true can be.
False.
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.
True
True. All squares are rectangles, but not all rectangles are squares.
False! Squares are parallelograms. Parallelograms can be squares or rectangles or neither.
All four-sided polygons are squares. (False) Squares are all four-sided polygons. (True)
all squares are rectangles but not all rectangles are squares
All squares are parallelograms, but all parallelograms are not squares.
false
True as true can be.
false. you can have a 3 by 5 or a 8 by 29
True only if they have different diameters
true:right angles are similar
True because when they have the same interior angles then they are similar in shape