Geometry

Lesson: 9 – 3

Rotation

Objective:Draw rotations in the coordinate plane.

Rotations

Rotate Counter

clockwise for this lesson.

90 Degree Rotation

180 Degree Rotation

270 Degree Rotation

Triangle JKL is shown. What is the image of point J after a 270 degree rotation counterclockwise

about the origin.

A. (-3, 7)

B. (-7, 3)

C.(-7, -3)

D.(7, -3)

GeometryLesson: 9 – 4

Compositions of Transformations

Objective:Draw glide reflections and other compositions of isometries in the

coordinate plane.Draw compositions of reflections in parallel and intersecting lines.

Composition of transformations

A transformation of a transformation.

Glide ReflectionThe composition of a translation followed by a reflection in a line parallel to the translation vector.

Horizontal Translation

Rotation about the point of intersectionof lines m and p.

Homework

Worksheet Pg. 20 & 22

Worksheet Pg. 25 & 27