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Section 10.3

Chapter 10. Section 10.3. Exercise #1. Identify the polygon and find the sum of the measures of the angles. Octagon. (n – 2)(180°) = sum of the angles. (8 – 2)(180°) = sum of the angles. (6)(180°) = sum of the angles. 1080° = sum of the angles.

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Section 10.3

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  1. Chapter 10 Section 10.3 Exercise #1

  2. Identify the polygon and find the sum of the measures of the angles.

  3. Octagon

  4. (n – 2)(180°) = sum of the angles

  5. (8 – 2)(180°) = sum of the angles

  6. (6)(180°) = sum of the angles

  7. 1080° = sum of the angles

  8. The sum of the angles of an octagon is 1080°.

  9. Chapter 10 Section 10.3 Exercise #11

  10. Find the perimeter.

  11. 22 yd 16 yd 16 yd 22 yd P = 16yd + 22yd + 16yd + 22yd

  12. 22 yd 16 yd 16 yd 22 yd P = 2(16yd) + 2(22yd)

  13. 22 yd 16 yd 16 yd 22 yd P = 32yd + 44yd

  14. 22 yd 16 yd 16 yd 22 yd P = 76yd

  15. 22 yd 16 yd 16 yd 22 yd The perimeter is 76 yd.

  16. Chapter 10 Section 10.3 Exercise #17

  17. Find the perimeter.

  18. 5 ft 3 ft 4 ft 4 ft 7 ft 7 ft 2 ft 10 ft 5ft + 4ft + 2ft + 4ft + 3ft + 7ft + 10ft + 7ft P =

  19. 5 ft 3 ft 4 ft 4 ft 7 ft 7 ft 2 ft 10 ft P = 42ft

  20. 5 ft 3 ft 4 ft 4 ft 7 ft 7 ft 2 ft 10 ft The perimeter is 42 ft.

  21. Chapter 10 Section 10.3 Exercise #23

  22. How many feet of hedges will be needed to enclose a triangular display at an amusement park if the sides measure 62feet, 85feet, and 94feet?

  23. 94 ft 62 ft 85 ft Perimeter = 62ft + 85ft + 94ft

  24. 94 ft 62 ft 85 ft Perimeter = 241ft

  25. 94 ft 62 ft 85 ft 241 ft of hedges are needed.

  26. Chapter 10 Section 10.3 Exercise #27

  27. How many times must a person walk around a football field in order to walk a mile? The dimensions of a football field are 360 feet by 160 feet. One mile = 5280 feet.

  28. 360 ft 160 ft 160 ft 360 ft Perimeter = 2(160ft) + 2(360ft)

  29. 360 ft 160 ft 160 ft 360 ft Perimeter = 320ft + 720ft

  30. 360 ft 160 ft 160 ft 360 ft Perimeter = 1040 ft 1 mile = 5280 ft

  31. 360 ft 160 ft 160 ft 360 ft 5280 ft = 5.08 1040 ft

  32. 360 ft 160 ft 160 ft 360 ft A person needs to walk around a football field a little over 5 times to walk a mile.

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