Investigation 1

1. Investigation 1 Stretching & Shrinking K. Williams Rm 203

2. POD 10/14/10 • Figure 1 is the original shape. Analyze how Figure 1 was changed to Figures 2, 3, & 4 Fig. #3 Fig. #1 Fig. #4 Fig. #2

3. Notes: Vocabulary Terms • Image—it is what the original looks like after being transformed: • turned (rotate), • moved over (translate), • flipped (reflect), • bigger (enlarge), • smaller (reduce) or • the same (similar) • Stretch/Enlarge/Enlargement—bigger than the original (more than 100%) • Shrink/Reduce/Reduction—to make smaller than the original (less than 100%)

4. Practice • How are Figures 2, 3, 4, & 5 different from Figure 1? Utilize the terms: • turned (rotate), • moved over (translate), • flipped (reflect), • bigger (enlarge), • smaller (reduce) or • the same (similar) Fig. #1 Fig. #2 Fig. #3 Fig. #5 Fig. #4

5. 20 18 14 12 10 8 6 4 2 (0,0) 4 6 8 10 12 14 16 2

6. Draw what the shape would look like if it is doubled in size. Then draw what it would look like it is was half the size. POD 10/15/10

7. Answer the following questions • How was the perimeter affected? • How was the area changed? • Is there a rule that could be used to express the changes?

8. Notes: Vocabulary Terms • Corresponding sides- the matching sides of two different shapes that look alike but may not be the same size. • Ex. Side AB = Side PQ • Corresponding angles-the matching angles of two different shapes that look alike but may not be the same size. • Ex. Angle B = Angle Q • Does not change if the objects are similar. A C B P Q R

9. Write About… • Compare and Contrast the following two figures P A B C Q R

10. 20 18 14 12 10 8 6 4 2 (0,0) 4 6 8 10 12 14 16 2