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3.A: Properties of Quadrilaterals

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    The purpose of this lesson is to identify key quadrilaterals and properties about their angles and sides.

    This lesson will address the following CCRS Standard(s) for Geometry:

    • 7.G.6: Solve real-world and mathematical problems involving area, volume and surface area of two- and three- dimensional objects composed of triangles, quadrilaterals, polygons, cubes, and right prisms


    1. Take notes while watching videos below
    2. Go to and log into our course to complete assignment 3.A with 80% or better.


    Complete assignment 3.A with 80% or better at


    In this lesson we have learned:

    • The angles of a quadrilateral (four sides) add to 360o
    • Kites have two pairs of congruent sides that are consecutive
    • Parallelograms are quadrilaterals with opposite sides parallel
      • Opposite angles are congruent
      • Consecutive angles are supplementary
    • Rectangles are parallelograms with congruent (right) angles
    • Rhombi are parallelograms with congruent sides
    • Squares are parallelograms with congruent (right) angles and sides
    • Trapezoids only have one set of parallel sides

    3.A: Properties of Quadrilaterals is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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