Building a solid understanding of the different types of quadrilaterals, their properties, attributes and relationships is a vital first step toward introducing quadrilaterals whether you are classifying quadrilaterals as part of a geometry unit, teaching a unit on area and perimeter, discussing interior angle measures, doing tessellations, or delving into symmetry and transformations. For instance, it is difficult to find the area of trapezoid if a student cannot first identify the figure as a