mc1ss mc1ss
  • 21-03-2017
  • Mathematics
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eagerreader
eagerreader eagerreader
  • 22-03-2017
305-35=270 (SA of 3 triangular faces)
270/3=90 (area of one face)
A=.5BH
90=.5(9)H
90=4.5H
H=20 in
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