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May 01, 2014 §9.2 - Area of Regular Polygons Day 2 May 01, 2014 Recall: Day 2 Examples: Find the area of each regular polygon USING TRIGONOMETRY. Give your answers as a decimal approximation rounded to the nearest tenth. Don't forget UNITS! *round to 4 decimal places in the middle of the problem ex 1) Find the area of a regular heptagon with a side length of 2. EX 2) Find the area of a regular pentagon with a radius of 6. May 01, 2014 EX 3) Find the area of a regular nonagon with a side length of 6. EX 4) Find the area of a regular octagon with a side length of 4 cm. May 01, 2014 EX 5) Find the area of a regular octagon with apothem = 6 in. EX 6) Find the area of a regular 20-gon with radius = 3 cm. May 01, 2014 EX 7) Find the area of a regular pentagon with radius = 10 ft.