Answer:
[tex]\boxed{12.6}[/tex]
1) We will need to use our knowledge of the pythagorean theorem in order to solve this problem.
[tex] a^{2} + b^{2} = \sqrt {c} [/tex]
2) We already know what a and c are.
[tex] 22^2=484[/tex] and [tex] 18^2=324[/tex]
3) We simply need to subtract.
484-324= 160
[tex] \sqrt{160} [/tex] ≈ 12.6491106407
4) Simply, round to the nearest tenth as the problem requires.
12.6
Hence, the answer would be 12.6cm
