Question

Look at triangle ABC. What is the length of side AB of the triangle?

A) 3
B) 5
C) √6
D) √13

Answer 1

Use distance formula. 
√(2-5)²+(2-4)²
√(-3)²+(-2)²
√9+4
√13

Letter D.

Answer 2

The answer is D. I used the distance formula to solve