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Perimeter of a triangle ABC is 72 cm. Find the perimeter of the triangle DEF with vertices D,E and F as teh mid-points of the sides of the given triangle.



First find the sides of triangle ABC with Perimeter formula and substitute in DEF as they are congruent to each other
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Perimeter of triangle def = 1/2 perimeter of triangle abc
triangle def= 1/2x72
perimeter of triangle def= 36 cm.
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