What is the distance between the points (1,2), (-2,2) ?

The distance between points A(x1, y1) and B(x2, y2) is
given by sqrt[(x1 - x2)^2 + (y1 - y2)^2]

Here the points we
have to the distance between are (1, 2) and (-2, 2).

The
required distance between them is sqrt[(1 - (-2))^2 + (2 -
2)^2]

=> sqrt[(1 + 2)^2 + (2 -
2)^2]

=> sqrt[3^2 +
0^2]

=> sqrt[9 +
0]

=> sqrt 9

=>
3

The distance between the points (1, 2) and
(-2, 2) is equal to 3.