Question

(1) A(2, 3), B(4,1)​

Answer 1

Answer:

$ab = \sqrt{ {(2 - 4)}^{2} + {(3 - 1)}^{2} }$

$= \sqrt{ { - 2}^{2} + {2}^{2} }$

$= \sqrt{4 + 4}$

$= \sqrt{8}$