Within a euclidian plane R2, an isometry f is a translation if it f(x,y) = (x+a,y+b) for all points (x,y) in R2. It can also be constructed as the composition of two reflections in parallel lines.
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Yes, a scalene triangle can be a triangle.
a triangle in a triangle
A triangle is the same as a equilateral triangle because a equilateral triangle is a triangle but it is congruent on all sides
there is equilateral triangle, right triangle, isosceles triangle, obtuse triangle, acute triangle, scalene triangle and oblique triangle