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Question 139

If the mid points of the sides AB and AC of a triangle ABC are (4, -2), (-8, 14) respectively, then the length of the side BC, in units, is

Solution

let the mid points of the slides AB and AC of the triangle is D(4,-2) and F(-8,14)

which is parallel to the BC and BC = 2DF

then DF Length is DF = (-8 +4) + (!4 + 2) = 20

then BC = 2* 20 = 40 Answer

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