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Name Class Date Practice 3-5 The Polygon Angle-Sum Theorems Find the values of the variables for each polygon. Each is a regular polygon. 1. x ,y 2. n 3. a y a n x All rights reserved. ,b b Find the missing angle measures. 4. 5. A x 6. H 124 150 B G 91 93 E 160 F D L 100 80 C 48 P I 112 M 130 J x K 71 x N For a regular 12-sided polygon, find each of the following. © Pearson Education, Inc., publishing as Pearson Prentice Hall. 7. the measure of an exterior angle 8. the measure of an interior angle The measure of an interior angle of a regular polygon is given. Find the number of sides. 9. 120 10. 108 Identify each item in Exercises 11–14 in the figure. B 11. quadrilateral 12. exterior angle F A 13. pair of supplementary angles 14. pentagon E D L1 Practice C Geometry Lesson 3-5 217