Theoretically, some Roman guy. That's only who invented the name triangle though. As for the first shape with three sides, I would say someone in the Indus River Valley if your speaking of humans. If else, probably some random animal accidentally scribbled one in the dirt. Of course, even before that, natural formations in land probably made triangles.
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pascal
A Scales triangle is a triangle that has no equal angles or sides! That is so easy!I don't know who put the first answer but, they were not very smart. It is called a scalene triangle first of all and second of all saying "that is so easy" is rude because obviously if they thought it was easy, they wouldn't have asked the question in the first place!
A triangle is made up of 3 angles, which equal 180 degrees.
If the triangle is made up of three bent arrows, then it is a recycling symbol which means that the object is made of HDPE: high density polyethylene.If the triangle is made up of three bent arrows, then it is a recycling symbol which means that the object is made of HDPE: high density polyethylene.If the triangle is made up of three bent arrows, then it is a recycling symbol which means that the object is made of HDPE: high density polyethylene.If the triangle is made up of three bent arrows, then it is a recycling symbol which means that the object is made of HDPE: high density polyethylene.
First you draw a tringsl