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Name _______________________________________ Date ___________________ Class __________________ 7.1 Practice Ratio in Similar Polygons Fill in the blanks to complete each definition. 1. A similarity ratio is the ratio of the lengths of the ____________________ sides of two similar polygons. 2. Two polygons are similar if and only if their corresponding angles are ____________________ and their corresponding sides are.____________________. 3. Figures that are similar have the same shape but not necessarily the same ____________________. Use the figure for Exercises 4 and 5. The triangles are similar. 4. Name the pairs of congruent angles. A ____________________ B ____________________ C ____________________ 5. Write the corresponding side lengths in the proportion below. AB DE FD Use the figure for Exercises 6 and 7. The triangles are similar. 6. Circle the correct similarity statement. QRS KJL RSQ KJL QSR LKJ 7. Write a proportion with all three pairs of corresponding side lengths. _______________________________________ Identify the pairs of congruent corresponding angles and the corresponding sides. 8. 9. ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Geometry Name _______________________________________ Date ___________________ Class __________________ Determine whether the polygons are similar. If so, write the similarity ratio and a similarity statement. If not, explain why not. 10. parallelograms EFGH and TUVW 11. CDE and LMN ________________________________________ ________________________________________ ________________________________________ ________________________________________ Tell whether the polygons must be similar based on the information given in the figures. 12. 13. ________________________________________ 14. ________________________________________ 15. ________________________________________ ________________________________________ Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Geometry