Best of the Web. Picked by our PhDs
Having a tough time remembering which quadrilateral has which property? Take a look at this great website full of simple explanations and colorful graphics. Not a proof in sight to distract you. Just pure quadrilateral bliss.
Click and drag these shapes according to their properties and prove that you've got what it takes to be a quadrilateral master. Unfortunately, no, you don't get a trophy.
This useful resource about quadrilaterals will answer any other burning questions you might have about them. Plus, create your own quadrilateral by dragging vertices around. What could be more fun? Don't answer that.
Got harmony? Got autotune? Got quadrilaterals? This song certainly has all that and some more. It'll take you to new levels of geometry and euphony. Just don't blame us if it's stuck in your head all day.
A super creative stop-motion film explaining the properties of some important quadrilaterals. Enjoy the music, enjoy the colors, and enjoy the art.
Are you though? We'll need some convincing. If this parallelogram wants to prove himself, he'll need to convince us with all the properties he's got going on. And no, we aren't talking about his crash pads.
A quick review of the Pythagorean Theorem might be helpful when working with quadrilaterals. All that stuff we learned about triangles earlier doesn't just go away, you know.
Games and Tools
Can't tell a rhombus from a rectangle? Don't worry. We've got you covered. After enough rounds of this game, you'll be well-equipped to deal with any quadrilateral that dares to cross your path.
Click through these multiple games to double check that you remember all the properties of the different quadrilaterals. From guessing games and multiple choice questions to helpful glossaries and lists of theorems, hop on over to test your knowledge of rectangles, trapezoids, and rhombi and how they're alike or different.
Think you have what it takes to figure out this parallelogram proof? We'll tell you now: it's a doozy. Solve this one, and feel free to do a few more while you're at it. Perfect the art of proving statements about quadrilaterals. Sounds easy, but it's not as simple as you might think.