Answered

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——AB. Formed by (0,2) and (5,4)—-AB formed by (1,8) and (3,3)Parallel, Perpendicular or neither?

Sagot :

Line AB

[tex]\begin{gathered} \text{slope}=m=\frac{y_2-y_1}{x_2-x_1} \\ m=\frac{4-2}{5-0}=\frac{2}{5} \end{gathered}[/tex]

Line CD

[tex]m=\frac{3-8}{3-1}=\frac{-5}{2}[/tex]

For lines to be perpendicular the product of their slope is equals to negative 1.

[tex]\begin{gathered} m_1m_2=-1 \\ \frac{2}{5}\times-\frac{5}{2}=-\frac{10}{10}=-1 \end{gathered}[/tex]

Therefore, the lines are perpendicular.

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