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(hipotenusa)^2=(cateto)^2+(cateto)^2
#a) h^2=5^2+9^2
h^2=25+81
h^2=106
h=√106
h=10.29DM
#b) 18^2=14^2+a^2
324-196=a^2
√128=a
√16*√8=a
4√8CM=a
#c)49=25+v^2
49-25=v^2
√24=v
2√6M=v