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Angles, a la Shmoop When two old friends bump into each other,

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it’s called a “reunion.” Or, if they really don’t like each other

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anymore, it’s called “awkward.” But when two lines bump into each other, the

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space where those lines meet is called an angle.

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If that angle is less than ninety degrees, it is an acute angle.

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That’s “acute angle” with an “A” at the beginning,

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These angles have less than ninety degrees, and it’s one of the five different types

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of angles… …or six if you count pro wrestler Kurt Angle.

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In fact, we’re a little nervous about not counting him.

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A right angle is an angle that’s exactly ninety degrees…

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…which means it is formed when two straight lines meet in a perpendicular fashion…

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…or when some yoga master bends in a really zany way.

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An obtuse angle is an angle that is between ninety and one hundred and eighty degrees.

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A reflex angle is an angle greater than one hundred and eighty degrees, which makes it

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the greatest of all angles. Not that it needs a bigger head.

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The final type of angle hides in plain sight – it’s sorta the chameleon of the angle

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world. Take a gander at this image, and tell us where

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the angle is. We’re waiting. You give? It’s right here.

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It might look like a plain old line, but it’s technically a “straight angle.”

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Be careful when handling one – those straight edges will getcha.

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A straight angle can only be exactly one hundred and eighty degrees…

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…or, in other words, what we call “a line” here at Shmoop.

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So why do you need to know all these guys? Knowledge of angles can help you get dozens

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of awesome jobs in fields such as engineering, construction, real estate, and architecture.

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It will also help you build the most technically perfect paper footballs.

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