Assumed 73.6cm is the hypotenuse.
[tex] a^{2} + b^{2} = c^{2} [/tex]
[tex] 19^{2} + b^{2} = 73.6^{2} [/tex]
[tex] b^{2} [/tex] = [tex] 73.6^{2} -19^{2}[/tex]
[tex] b^{2} [/tex] = [tex] 5055.96 [/tex]
[tex] b[/tex] = [tex] 71.1 [/tex]
Assumed 73.6cm is not the hypotenuse.
[tex] a^{2} + b^{2} = c^{2} [/tex]
[tex] 19^{2} + 73.6^{2} = c^{2} [/tex]
[tex] c^{2} [/tex] = [tex] 73.6^{2} +19^{2}[/tex]
[tex] c^{2} [/tex] = [tex] 5777.96 [/tex]
[tex] c[/tex] = [tex] 76.0 [/tex]
