1.) Graph triangle ABCA (-1, 2), B (-2, 5), and C (3, -1)

2) Reflect ABCD over the y axis and draw A’B’C’

3) Translate A’B’C’ right 3 and down 7.

4) What are the coordinates of A”B”C”?

Problem of the Day

Homework Answers:

4. no6. yes8.yes

18. BCDEHIKOX20. y axis22. x axis26. (−x, −y)28. (y, x)

10. 12. 14. 16. 24.

COUNTER-CLOCKWISE goes in the order of the quadrants

CIII

III IV

CLOCKWISE goes the direction clock hands move

EACH QUADRANT = 90˚

Example 2

Lets get some rules for

ROTATIONS

When an object rotates 180˚ _______________________________________________

Example: Rotate Z (-2, 3) 180˚ about the origin __________

When rotating 90˚ COUNTERclockwise__________________________________

_________________________________

Example: Rotate Z (-2, 3) 90˚ counterclockwise about the origin __________

When rotating 90˚ clockwise__________________________________

_________________________________

Example: Rotate Z (-2, 3) 90˚ clockwise about the origin__________

Flip paper upside down. Coordinates become (-x,-y)

Rotate paper CLOCKWISE.

Coordinates become (-y,x)

Rotate paper counter-clockwise.

Coordinates become (y,-x)

1.) Graph triangle ABCDA (-6, 5), B (-4, 1), and C (0, 2)

2) Rotate ABC 90˚ counterclockwise about the origin. Draw A’B’C’

3) What are the new coordinates?

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