Question

which figure is not a rhombus?

Explanation:

Step1: Recall rhombus properties

A rhombus is a parallelogram with all - sides equal. A parallelogram has two pairs of parallel sides.

Step2: Analyze each figure

The first figure is a trapezoid (it has only one pair of parallel sides). The second figure is a parallelogram. The third figure is a triangle. The fourth figure is a square (a special - case of a rhombus). A trapezoid and a triangle are not rhombuses. Since a square is a rhombus and a parallelogram can be a rhombus (when all sides are equal), the non - rhombus figures among the options are the trapezoid and the triangle.

Answer:

The trapezoid and the triangle are not rhombuses.