OBJECTIVES: The students will be able to "shrink" an object using marked vectors.
PROCEDURE:
(1) Lecture/discussion
(2) Demonstration (within lecture)
(3) Individual work on computer
LESSON/CLASSWORK:
I. BRIEF REVIEW OF YESTERDAY'S WORK
A. What is dynamic rotation?
B. How does it differ from fixed rotation?
II. DILATION (SHRINKING)
A. What is dilation?
B. What are the defining data?
(1) Center point
(2) Two vectors
C. Process
(1) Draw object to be dilated
(2) Construct center point
(3) Construct two vectors
(4) "Mark" vectors: first the shorter one, then the longer one, using the "mark vector" in the drop-down box for "Transform"
(5) Mark center point, then highlight all of object to be dilated
(6) Click "Dilate" in drop-down box
D. Results
(1) Have original object
(2) Have smaller version of object
III. WRAP-UP
A. Regroup
B. Discuss results and other findings
IV. DISMISS