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11.1-11.2 Review This is also posted online with solutions on the last slide!

11.1-11.2 Review This is also posted online with solutions on the last slide!. 1. What is the sum of the interior angles of an octagon?. 2 . What is the sum of the exterior angles of a 32-gon?. 3. What is the measure of one interior angle of a regular 20-gon?.

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11.1-11.2 Review This is also posted online with solutions on the last slide!

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  1. 11.1-11.2 Review This is also posted online with solutions on the last slide!

  2. 1. What is the sum of the interior angles of an octagon?

  3. 2. What is the sum of the exterior angles of a 32-gon?

  4. 3. What is the measure of one interior angle of a regular 20-gon?

  5. 4. What is the measure of one exterior angle of a regular pentagon?

  6. 5. The measure of one interior angle of a regular polygon is 120o. What type of polygon is it?

  7. 6. In a decagon, the sum of its interior angles is (20x + 2y)o and the sum of its exterior angles is (-6x + 3y)o. Solve for x and y.

  8. 7. In a regular dodecagon, each interior angle measures (3x2 – 41x)o. Solve for x.

  9. 8. Solve for x. (x2)o (10x+ 20)o 140o 150o (8x)o 130o

  10. 9. Solve for x.

  11. 10. A regular hexagon has a radius of 14 cm. Find its area. Keep your answer in exact, simplest form.

  12. 11. A regular nonagon has an apothem of 2 in. Find its area. Round to the nearest tenth at the end.

  13. 12. A regular dodecagon has a radius of 6 mm. Find its area.

  14. 13. A square has a radius of 7 ft. Find its area.

  15. 14. a) A regular 20-gon has an area of 150 ft2. Find its apothem. b) A regular 20-gon has a perimeter of 100 ft. Find its apothem.

  16. 15. An equilateral triangle has a radius of 5 in. Find its area in exact, simplest form.

  17. 16. A regular hexagon has an apothem of 4 m. Find its perimeter in exact, simplest form.

  18. Solutions 1080o 360o 162o 72o Hexagon x = 50, y = 220 x = 50/3, -3 x = 10 x = 11/2, 6 294 cm2 13.1 in2 108 mm2 98 ft2 a) 3 ft b) 15.8 ft in2 16 m

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