Question

Cameron calculated the distance between point C and point D below.is the distance correct? If not, what is her mistake?d=√((-2) + 2)² + (6 + 3)²= √(0)² + (9)²=9

Answer 1

Her calculation on the distance is wrong. It should have been done as follows

`\begin{gathered} d=√(((-2)-2)^2+(6-3)^2) \\ d=√((-2-2)^2+3^2) \\ d=√((-4)^2+9) \\ d=√(16+9) \\ d=√(25) \\ d=5 \end{gathered}`

So, the distance is 5 and not 9.

Her mistake was that she should have subtracted and not add the coordinates of x and y between the two points before square