Question

If a= (-1,-3) and b= (11,8), what is the length of AB?

Answer 1

4.80 units (3 s.f.)

Explanation:

`distance \: formula \\ = \sqrt{(x1 - x2)^(2)+ (y1 - y2)^(2) }`

Hence, length of AB

= √(11+1)^2 - (8+3)^2

= √ 12^2 -11^2

= √ 23

= 4.80 units (3 s.f.)