Question

(-2,-1) (1,-1) find the distance between two points

Answer 1

3

Explanation:

`\bold{METHOD\ 1:}\\\\\text{Use the formula:}\\\\d=√((x_2-x_1)^2+(y_2-y_1)^2)\\\\\text{Substitute the coordinates of the give points:}\\\\d=√((1-(-2))^2+(-1-(-1))^2)=√((1+2)^2+(-1+1)^2)\\\\=√(3^2+0^2)=\sqrt9=3`

`\bold{METHOD\ 2:}\\\\\text{We can see that the second coordinates of the points (ordinate) are the same.}\\\text{Therefore, the distance between these points is equal to the distance}\\\text{ between the first coordinates (abscissa).}\\\\d=|1-(-2)|=|1+2|=|3|=3`