Geometry for Dummies by Mark Ryan

Author:Mark Ryan
Language: eng
Format: epub
ISBN: 9781119181644
Publisher: Wiley
Published: 2016-07-05T00:00:00+00:00

Chapter 10 tells you all about seven different quadrilaterals — their definitions, their properties, what they look like, and where they fit on the quadrilateral family tree. Here, I fill you in on proving that a given quadrilateral qualifies as one of the seven types.

Throughout this chapter, you work on proofs in which you have to show that the quadrilateral in the diagram is, say, a parallelogram or a rectangle or a kite (the final line of the proof — or a line near the end — might be something like “ABCD is a rectangle”). Now, maybe you’re thinking that’ll be easy, that all you have to do is show that the quadrilateral has, say, one of the rectangle properties to prove it’s a rectangle. Unfortunately, it’s not that simple because there are instances where different types of quadrilaterals share the same trait. But don’t worry — this chapter tells you how to look beyond any family resemblance to get a positive ID.

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