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

SOLUTION

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

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

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