Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 23
e radius ofthe circumscribed circle, the radius of the inscribed circle, andhalf of one side of the polygon. If the polygon has n sides, the angle of this right triangle . -p ^ i ■ i * 1 (360°\ 180°at the centre of the polygon is equal to -1 1, or ; and the triangle may be solved when a side of the… … Fig. 22 THE RIGHT TRIANGLE 35 EXERCISE XI Find the remaining parts of a regular polygon, given:*• 1. 7i = 10, 0 = 1. 3. n = 20, r = 20. 5. 7i = ll, F= 20.2. 7i = 18, r = 1. 4. 7i = 8, A = 1. 6. 7i = 7, F = 7.Find the side of: 7. A regular decagon inscribed in a unit circle. 8. A regular decagon…
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