For quadrilaterals, it would be a rectangle, a square, or a rhombus.
Two sides of an isosceles triangle are also equal.
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This is called a Parallelogram. Each pair of opposite sides will then be the same length. If all four sides are the same length, and opposite sides are parallel, then it is a rhombus. NB: If all four sides are the same length then the opposite sides must be parallel.
By using the fact that opposite sides of a rectangle have the same length.By using the fact that opposite sides of a rectangle have the same length.By using the fact that opposite sides of a rectangle have the same length.By using the fact that opposite sides of a rectangle have the same length.
The length and width of a rectangle is the same as the length and width of the opposite sides.
If both pairs of opposite sides are the same length, and both pairs of opposite angles are the same, the quadrilateral is a parallelogram (rhombus, rectangle, or square).
a square