Question #164f6

1 Answer
Nov 5, 2017

13.4350

Explanation:

Consider square ABDC

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We know that ABD is 90o

We also know that the length of AB is equal to the length of BD.

We can analyze ABD and use Pythagorean theorem to solve for the length of the sides.

a2+b2=c2
a and b are the sides, and c is the diagonal which is equal to 19.
Since, a and b are equal, we can just use one variable, say s.

s2+s2=192
2s2=361
s=13.4350