PSA2QEK - Exit Tickets---Geometry, M1, Lesson 18 (G.CO.5)
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Construct a line through the point P below that is parallel to the line l by rotating l by 180° (using the steps outlined in Example 2).

 

Steps outlined in Example 2:

 

a. Label any point A on l

 

b. Find the midpoint of segment AP using a ruler. (Measure the length of segment AP, and locate the point that is distance AP/2 from A between A and P.) Label the midpoint C. 

 

c. Perform a 180° rotation around center C. To quickly find the image of l under this rotation by hand:

  1. Pick another point B on l
  2. Draw .
  3. Draw circle: center C, radius CB. 
  4. Label the other point where the circle intersects  by Q. 
  5. Draw 

 

d. Label the image of the rotation by 180° of l by l' = Rc,180(l).

 

Draw your graph on paper, take a picture, and upload it using the image upload icon .

 

If you do not have the ability to upload an image of your work, type “Graph is on paper."

 

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Why is the parallel line you constructed the only line that contains P and is parallel to l?

 

Modified from EngageNY ©Great Minds Disclaimer

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