Introduction
Using Direct Proofs to Prove the Properties of Quadrilaterals

A student working on a mobile phone writing in a notebookYou will need to use your knowledge of parallelograms, rectangles, rhombi, squares, trapezoids, and isosceles trapezoids to prove the properties of quadrilaterals. You have already learned the definitions for each of the quadrilaterals. Each one of these quadrilaterals has properties that can be proved. In this topic, you will explore these proving properties.

Essential Question

 

Warm-Up

Quadrilaterals Family Tree Interactivity

Warm-up iconThere are many different types of quadrilaterals. Before you use direct proofs to prove the properties of quadrilaterals, test your knowledge of these figures in this non-graded interactivity. Click the player button to get started.