Question 179635
In a right triangle, find the length of the side not given 
a=? b=1 c= sqr.root of 5 
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Since c^2 = a^2 + b^2

a^2 = c^2 - b^2

a^2 = (sqrt(5))^2 - 1^2

a^2 = 5 - 1

a = 2
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Cheers,
Stan H.