?
My first is in shape but not in space;
My second is in line and also in place;
My third is in point but not in line;
My fourth in operation but not in sign;
My fifth is in angle but not in degree;
My sixth is in glide but not symmetry;
My seventh in round but not in square;
My last is in patterns you see everywhere;
My whole is a polygon, regular not wide;
But what is the sum of the angles inside?
Hint: split the shape into triangles
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