c - przeciwprostokatna
c2 = a2 + b2
c2 = 144 + 81
c2 = 225
c= 15
P = 12 razy 9 razy 1/2 = 6 razy 9 = 54
54 = 15 razy h razy 1/2
54 = 7,5 razy h /: 7,5
h = 7,2
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c - przeciwprostokatna
c2 = a2 + b2
c2 = 144 + 81
c2 = 225
c= 15
P = 12 razy 9 razy 1/2 = 6 razy 9 = 54
54 = 15 razy h razy 1/2
54 = 7,5 razy h /: 7,5
h = 7,2