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rosijanka [135]
3 years ago
11

Ellen rotated triangle ABC 90° clockwise around point A to form triangle ACD and rotated triangle ABC 180° clockwise around poin

t A to form triangle ADE.
Which transformation should she perform on triangle ADE to ensure that BE ≌ DC?




A. a 90° clockwise rotation around point A
B. a 90° counterclockwise rotation around point E
C. a translation 2 units left
D. a translation 2 units down
Mathematics
1 answer:
Serjik [45]3 years ago
6 0
It is a. You didnt load the pic but if you did if you rotated Dc 90 it would complete BE. 
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The <em><u>correct answer</u></em> is:

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Explanation:

A rotation 90° counterclockwise maps each point (x, y) to (-y, x).  This means our points would be:

A(-4,3)→(-3, 4); B(-1,3)→(-3, -1); C(-2,1)→(-1, -2)

A translation 2 units right will add 2 units to the new x-coordinates; this gives us

(-3, 4)→(-1, 4); (-3, -1)→(-1, -1); and (-1, -2)→(1, -2)

These are the points in the image, so this is the correct set of transformations.

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