1. Similar figures & scale drawings

2. SIMILAR FIGURES Have the same shape, but not necessarily the same size
Have corresponding angles
Have corresponding sides
Corresponding Angles X A 53 53 6 9 37 B 37 C 8 Y 12 Z
Corresponding Sides

3. Key Concepts Similar figures have 2 properties:
1. Corresponding Angles must have the same measurement
2. The lengths of Corresponding Sides must be proportional

4. To set up the proportion…
Put measurements for the smaller figure in the numerator spots and the measurements for the bigger figure in the denominator spots
Cross Multiply

5. Example… 24 E F A 16 B x 18 D C G H
x = 16 24
Step 1 – cross multiply x = 18(16)
Step 2 – multiply x = 288
Step 3 – divide by whatever is
connected to your variable
24x = 288
x = 12