Question

If A(-6,7) and B(-1,-5) are two given points then the distance 2AB is 

(a) 13 

(b) 26 

(c) 169 

(d) 238

Answer 1

Correct answer is (b) 26

The given points are A(-6,7) and B(-1,-5). So

AB = \(\sqrt{(-6+1)^2+(7+5)^2}\)

= \(\sqrt{(-5)^2+(12)^2}\)

= \(\sqrt{25+144}\)

= \(\sqrt{169}\)

= 13

Thus, 2AB = 26.