Lesson: Performing Rotations

Prerequisite Knowledge: Students must have prior knowledge the coordinate plane. They must have knowledge regarding right angles.

Learning Objectives: Students will be able to identify a rotation. Students will be able to visualize a rotation about the coordinate plane. Students will be able to perform regular polygon rotations of 90, 180 and 270 degrees on a coordinate plane.

Key Ideas: Rotations of (x,y) about the origin

Rotation of 90 (-y,x)

Rotation of 180(-x,-y)

Rotation of 270 (y, -x)

Motivational Problem: Have each student take two pieces of patty paper. On both of the pieces, have the students draw an x and y axis in dark marker. On one piece of patty paper, have students draw a regular polygon in the first quadrant. In their notebooks ask them to sketch the polygon as they rotate the figure 90°, 180° and 270°.

This can be modeled by teacher using a transparency on the overhead.

Important Questions: What is a center of rotation? Explain why rotating 90 degrees clockwise is the same thing as rotating 270 counter clockwise.

Do NOT follow this link or you will be banned from the site!

Non-profit Tax ID # 203478467