To solve such a question we must know about rhombus.
A rhombus is a quadrilateral whose all sides are of equal length, and the opposite are parallel to each other.
If a rhombus is divided along its diagonals then the triangles formed will always be "Isosceles; since a rhombus always has 4 equal sides, each triangle must have 2 equal sides".
As we know in a rhombus all the sides are equal to each other. If we draw diagonals of the Rhombus, then the diagonals will divide the rhombus into two equal parts such that for each of the triangles two sides other than the diagonal will be always equal.
If we divide the rhombus along any of the diagonal still the two sides will be equal.
Hence, If a rhombus is divided along its diagonals then the triangles formed will always be "Isosceles; since a rhombus always has 4 equal sides, each triangle must have 2 equal sides".
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