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here you go ..like this
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Anonymous:
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I have exam on Monday
i cant answer it again ...so.. given=DE =EF ......as u know centroid is intersection of medians so...DG=GE=7.5 DE=15 ,in triangle DHE ,,,,EH^2=DE^2-DH^2 == 15^2-9^2=144. EH=12 ...PH=12-8=4 FH=DH=9 ( eh is median) perimeter= DE + EF+ DF = 15+15+18 = 48 .
i hope this Will help
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