Question

2.2
score: 1/11 answered: 1/11
question 2
0/1 pt 3 99 details
find the distance between the points (1,2) and (2, - 1).
answer exactly.
question help: video

Explanation:

Step1: Recall distance formula

The distance formula between two points $(x_1,y_1)$ and $(x_2,y_2)$ is $d = \sqrt{(x_2 - x_1)^2+(y_2 - y_1)^2}$.

Step2: Identify coordinates

Here $x_1 = 1,y_1 = 2,x_2 = 2,y_2=-1$.

Step3: Substitute values

$d=\sqrt{(2 - 1)^2+(-1 - 2)^2}=\sqrt{1^2+(-3)^2}=\sqrt{1 + 9}=\sqrt{10}$.

Answer:

$\sqrt{10}$