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A shape that has 12 corners is called a dodecagon. This shape not only has 12 corners but alsoÊ12 sides.
Oh, dude, a triangle has zero square corners! I mean, it's called a triangle for a reason, right? Like, if it had square corners, it would be a square or a rectangle or something. But nope, triangles are all about those three angles and three sides, no squares in sight!
If the shape (a quadrilateral) has only 2 parallel sides, it is a trapezoid (UK trapezium).A shape with four sides and two sets of parallel sides is a parallelogram (rectangle, square, rhomboid, rhombus) because these figures have four sides and two sets of parallel sides.
Move two adjacent coins, leaving the other pair of adjacent coins untouched. Place them on opposite sides of the unmoved pair, so that they become diagonally opposite corners of the new square.
A regular polygon must have all its sides equal and all its angles equal. The only regular quadrilateral is a square.