Answer:
pythagorean theorem!
Step-by-step explanation:
a²+b²=c² (normal)
a²=c²-b² (to find a)
[tex]a { = \sqrt{c {}^{2} } } - b ^{2} [/tex]
[tex]a = 38 ^{2} - 27 ^{2} [/tex]
[tex]a = \sqrt{1444 - 729} [/tex]
[tex]a = \sqrt{715} [/tex]
[tex]a = 26.7394839142[/tex]
