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Mathematics 21 Online
OpenStudy (anonymous):

what's a vertex?

OpenStudy (anonymous):

Like in a triangle --- a vertex is a point where the sides (the line segments) connect. So, a triangle has 3 vertices (which is the plural of "vertex"). I'll try to attach a drawing...

OpenStudy (anonymous):

|dw:1442619418318:dw| Oh my goodness, it's hard to write on the drawing board!

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