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What is skew? Skew lines – Geometry

By |2017-07-29T13:03:09+00:00July 29th, 2017|Math|

These two green lines are skew to each other. Skew is a pretty cool word, and it sounds like it means something really weird, and it kind of does. It means lines that go any which way. It describes any two lines that aren't either parallel or perpendicular to each other, and that don't cross each other anywhere (so [...]

What is a quadrilateral? Squares and rectangles

By |2017-07-29T12:01:49+00:00July 29th, 2017|Math|

This is a quadrilateral. A quadrilateral is a flat shape, in one plane, defined by four points at the four corners. A quadrilateral has four sides. The sides can be of any length. And it has four corners. They can be at any angle  to each other so long as they add up to 360 degrees. A rectangle is [...]

Parallel lines – Simple geometry

By |2017-07-29T11:36:46+00:00July 29th, 2017|Math|

Two parallel lines Two lines are parallel if they are in the same plane but they can go on forever without ever crossing. You can test this by seeing if you can draw a third line that crosses both lines at right angles (it is perpendicular to them). Parallel lines can be close together or far apart, [...]