Big Ideas Math Geometry, 2014
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Big Ideas Math Geometry, 2014 View details
2. Reflections
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Exercise 7 Page 186

Two points reflected in the x-axis have opposite y-coordinates.

Practice makes perfect

We are given three vertices of â–ł JKL. To graph the triangle, let's plot the points and then connect them.

To find the images of the points reflected in the x-axis, we can use the coordinate rule. Two points reflected in the x-axis have opposite y-coordinates.

(a,b) (a,- b)
J(2,-4) J'(2, 4)
K(3,7) K'(3, -7)
L(6,-1) L'(6, 1)

Now we can graph the image of â–ł JKL after a reflection in the x-axis.