Triangles are congruent to each other if they have the same 3 sides in length and have the same interior angles.
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The triangles must be congruent.
A square and rectangle both have congruent triangles in them.
false
isosceles triangles have 2 congruent sides scalene triangles have no congruent sides equilateral triangles have 3 congruent sides
no it makes a square.