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Basics of Quadrilaterals

As we walk through the geometric jungle, we see all types of different mathematical creatures. The sun shines rays down on the landscape. A circle rolls across our path. Angles are chirping like th...

Parallelograms

Parallelograms are everywhere. They hide in plain sight, staring us straight in the face. Like towel rods and toilets, we use them every day and never give them much thought. Right now, as you read...

Rhombi

Now that we've covered the most common type of quadrilateral that we come across, we can bust out our shovels and dig a little deeper for rarer quadrilaterals. How will we know if a quadri...

Rectangles

You've probably known what a rectangle was since you were in preschool. We have to admit, they're pretty popular shapes. In the quadrilateral yearbook, rectangles would be voted best dressed, while...

Squares

If you thought rectangles were special, you're in for a treat. They're called squares, and they're perfect in every way. Well, not every way because no quadrilateral is perfect. But squares are cer...

Kites

We're through with the parallelograms. That's all of the major quadrilaterals, right? Uh...not so much.There are a couple more families of quadrilaterals that don't really fit inside any nice box....

Trapezoids

The last family of quadrilaterals are the outcasts. They're different from the rest of the quadrilaterals, kind of like the socially awkward guest at the quadrilateral party.While the rest of them...

Cyclic Quadrilaterals

All our lives, we've been taught that boxes are bad. We shouldn't put things in boxes (at least, according to Rosencrantz and Guildenstern). It's better to think outside the box. And it's not exact...

Polygons

We've been focused on triangles and quadrilaterals for a long, long time. But in this geometric jungle, there exist many more shapes than just three- and four-sided animals. There are figures with...
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