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Naddik [55]
3 years ago
10

Line AB and CD have the following points: A(2, 4), B(9, 8), C(-1, 2), and D(3, -5). Are the lines parallel, perpendicular, or ne

ither?
Perpendicular
Neither
Parallel
Mathematics
2 answers:
inysia [295]3 years ago
6 0

We are given coordinates of A, B, C and D :

A(2, 4), B(9, 8), C(-1, 2), and D(3, -5).

Now, we need to find the slopes of AB and CD.

Slope of AB is :

\mathrm{Slope\:between\:two\:points}:\quad \mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}

\left(x_1,\:y_1\right)=\left(2,\:4\right),\:\left(x_2,\:y_2\right)=\left(9,\:8\right)

m=\frac{8-4}{9-2}

m=\frac{4}{7}.

Slope of CD is:

m=\frac{-5-2}{3-\left(-1\right)}

m=-\frac{7}{4}.

<em>Slope of CD is negative reciprocal of slope of slope of AB. </em>

<h3>Therefore, lines AB are CD are perpendicular.</h3>
xz_007 [3.2K]3 years ago
5 0

Answer:

c.Parallel

Step-by-step explanation:

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