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3.A: Properties of Quadrilaterals

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Overview

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

Directions

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

Do

Complete assignment 3.A with 80% or better at http://wamap.org

Summary

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