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d=5
d^+H^=13^
25+H^=169
144=H^
H=12
^ oznacza do kwadratu
b=4cm
d=13cm
d=√(a²+b²+c²)
13=√(9+16+c²)
169=25+c²
c²=144
c=12cm
wysokoścć wynosi 12cm