Which quadrilateral has two adjacent pairs of sides of the same length?

• A. Parallelogram
• B. Rhombus
• C. Kite
• D. Trapezoid

Answer: (C)

Two adjacent pairs of sides having the same length describes a shape where each pair of sides that meet at a vertex is equal, and the two pairs are typically different lengths from each other. That pattern is the defining feature of a kite: one pair of consecutive sides are equal, and the other pair of consecutive sides are equal as well. In a kite, these equalities occur next to each other around the shape, forming two distinct pairs.

Think about how other quadrilaterals behave: a parallelogram has opposite sides equal, not adjacent pairs. A rhombus has all four sides equal, which still fits two adjacent equal pairs in a sense, but there isn’t the idea of two different adjacent pairs as the defining property. The key idea here is two distinct pairs of neighboring sides being equal, which is precisely what a kite is.

So the shape that matches two adjacent pairs of equal-length sides is the kite.