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A three sided figure with equal dimensions.

It sides are usually marked with ticks to represent the perfect equality it represents.
"She, the equilateral triangle, is so perfect she's my bae" said Cole.
The equilateral triangle lives live at 60 degrees.
by celestial143 May 25, 2014
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2
Pretty much the answer to all questions, known and unknown.
Teacher: "Does anyone know why the forces on this triangle with the angles of 49, 49, 82, are similar?"
Dumbass Student: "EQUILATERAL TRIANGLE!!"
by Wahhhhhhhhhhh Granny October 16, 2006
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