1. 9.1 Properties of Similar Figures Learning Objective: To use ratios and proportions to find measures of similar figures and use scale models to find dimensions of objects.

2. Notes Learning Objective: To use ratios and proportions to find measures of similar figures and use scale models to find dimensions of objects. EX 1 – Tell whether the shapes are similar. Explain! Similar figures Corresponding angles are congruent Corresponding sides are in proportion a. S T U 10 X V W 15 59º No! Corresponding angles are not congruent all angles are 60º.

3. Learning Objective: To use ratios and proportions to find measures of similar figures and use scale models to find dimensions of objects. b. L C R M N B 3.2 D 2.5 4.5 9 5 Are the sides in proportion?

4. Learning Objective: To use ratios and proportions to find measures of similar figures and use scale models to find dimensions of objects. L C R M N B 3.2 D 2.5 4.5 9 5 Yes!

5. Learning Objective: To use ratios and proportions to find measures of similar figures and use scale models to find dimensions of objects. EX 2 – A school band designed a new insignia for the back of their uniforms. A scale drawing of the insignia was made with a scale of 4:7. The insignia in the scale drawing is 5 cm wide and 12 cm tall. The insignia will be 8.75 cm wide on the uniforms. Find the height of the insignia. check

6. HW – p. 449 #1-18, 26-28 Out – Compare and contrast similar and congruent figures. Summary – Something new I learned was… POW!!