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The image of triangle ABC is rotated 180 degrees to image A’B’C’ about the origin. If point A is located at (-1,-2), then name the coordinates of A’. Be sure that your answer is in (x,y) notation with no spaces.


 

A. (6,1)

 

 

B. (-3,-2)

 

 

C. (1,2)

 

 

D. (-2,5)

 

 

 

The pre-image of triangle ABC is rotated 180 degrees to image A’B’C’ about the origin. If point B is located at (-2,-5), then name the coordinates of B’. Be sure that your answer is in (x,y) notation with no spaces.

 

A. (5,-2)


B. (-2,1)


C. (2,5)


D. (1,2)

 

 

The pre-image of triangle ABC is rotated 180 degrees to image A’B’C’ about the origin. If point C is located at (-4,3), then name the coordinates of C’. Be sure that your answer is in (x,y) notation with no spaces.

 


A. (4,-3)


B. (-2,1)


C. (1,2)


D. (-1,-2)

 Mar 9, 2020
 #1
avatar+109499 
+4

First  one :

Coordinates  of  A '   =  (1,2)

 

Second one :

Coordinates of B '  = (2, 5)

 

Third  one :

Coordinates  of C'   = (4, -3)

 

Note  that the  rule for a 180°  rotation  seems to  be :

 

(x , y)  ⇒  ( -x, - y)

 

 

cool cool cool

 Mar 10, 2020

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