In a ΔABC, D, E and F are respectively, the mid-points of BC, CA and AB. If the lengths of side AB, BC and CA are 17 cm, 18 cm and 19 cm respectively, then the perimeter of ΔDEF is equal to :
A54 cm
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The perimeter of ΔDEF is 12 cm.
Here in a ΔABC, D, E and F are the mid points of BC, CA and AB respectively. Therefore the perimeter of ΔDEF is 12 cm.
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