Triangles JOK and JOL are congruent because:
* They have one common side
* They both are right triangles
This means that sides JK and JL are congruent and JK = 3.
From the right triangle JOK we have the length of the two legs: 1.6 and 3, thus we can calculate the hypotenuse with the Pythagorean's theorem:
[tex]\begin{gathered} OJ^2=3^3+1.6^2 \\ \text{Calculate:} \\ OJ^2=9+2.56=11.56 \\ OJ=\sqrt[]{11.56} \\ OJ=3.4 \end{gathered}[/tex]
OJ = 3.4
