Look at the triangle ABC.
Please help!

Answer:
√13
Step-by-step explanation:
Find the length AC and BC
AC=5-2
=3 (AC found in the y-axis so we substract the y values)
BC=4-2
=2 (BC found in the x-axis so we substract the x values)
then by using pythagoras we can find AB
AB^2=BC^2+AC^2