數學問題......10 points
2017/07/04 09:14
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數學問題......10 points
發問:
The area of a parallelogram is 80 (c㎡) . Two of the sides are of legths 6 (cm) and 15 (cm). Find the angles of the parallelogram correct to the nearest 0.1 ° .
最佳解答:
let the points of the parallelogram be ABCD respectively cut the parallelogram into two triangle each triangle's area is 80/2 = 40c㎡ ABC is an acute angle area of triangle = 1/2 (15) (6) (sin ABC) 40 = 45 sin ABC ABC = 62.7 ° the another angle = 180-62.7=117.3° the angles of the parallelogram are 62.7° and 117.3°
其他解答:
數學問題......10 points
發問:
The area of a parallelogram is 80 (c㎡) . Two of the sides are of legths 6 (cm) and 15 (cm). Find the angles of the parallelogram correct to the nearest 0.1 ° .
最佳解答:
let the points of the parallelogram be ABCD respectively cut the parallelogram into two triangle each triangle's area is 80/2 = 40c㎡ ABC is an acute angle area of triangle = 1/2 (15) (6) (sin ABC) 40 = 45 sin ABC ABC = 62.7 ° the another angle = 180-62.7=117.3° the angles of the parallelogram are 62.7° and 117.3°
其他解答:
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Area of a parallelogram = ab sinx ab sinx=6x15 sinx=80 90 sinx=80 sin x=8/9 x=sin^-1 8/9 x=62.7 Therefore, the angles of the parallelogram are 62.7 and 117.3.你可能會有興趣的文章：
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