Question

Use the following to determine the distance A (13,7) B (-9,4).

1) 5
2) √493
3) √137
4) √112

Answer 1

distance equals \[\sqrt{(4-7)^{2}+(-9-13)^{2}}=\sqrt{493}\]

Answer 2

Use the distance formula:
\[d = \sqrt{(x_{1} - x_{2})^{2} + (y_{1} - y_{2})^{2}}\]

Answer 3

draw a picture and then find some lengths



a right triangle is formed...

used pythagoras' theorem to find d

d^2 = 22^2 + 3^2

\[d = \sqrt{493}\]