ok you seem to want the lengths of the sides if the 3 points were joined to form a triangle
using the distance formula, solve the following points;
1. a = 3,2 should be A(3,2)
b = 7,5 should be B(7,5)
c = 8,14 should be C(8,14)
Capital letters are used for points and the coordinates (the 2 numbers with a comma between) must but inside round brackets
So if you want the distance of the side
A(3,2) \(x_1=3,\quad y_1=2\)
B(7,5) \(x_2=7, \quad y_2=5\)
\(distance = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\ distance\; AB = \sqrt{(7-3)^2+(5-2)^2}\\ distance\; AB = \sqrt{(4)^2+(3)^2}\\ distance\; AB = \sqrt{16+9}\\ distance\; AB = \sqrt{25}\\ distance\; AB = 5\;units\)
now you need to go through the same steps to get distance AC and then distance BC 
