1.What is the measure of one exterior angle of a regular pol
1.What is the measure of one exterior angle of a regular polygon having 40 sides?
2.To the nearest thousandth,what is tan (77o)
3.When the angle of elevation to the sun is 26o,a flagpole casts a shadow that is 82 feet long.What is the height of the flagpole to the nearest foot?
9
4.What is the value of ∑ 2k – 3
k = 4
5.1.Find the sum of the infinite geometric series:3 + 1.8 + 1.08 + 0.648 + …
2.To the nearest thousandth,what is tan (77o)
3.When the angle of elevation to the sun is 26o,a flagpole casts a shadow that is 82 feet long.What is the height of the flagpole to the nearest foot?
9
4.What is the value of ∑ 2k – 3
k = 4
5.1.Find the sum of the infinite geometric series:3 + 1.8 + 1.08 + 0.648 + …
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yuechen100 幼苗
共回答了13个问题 举报
1. 答案9°
求正40边形外角度数。
正40边形所有内角度数和=38*180°=6840，每个内角度数6840/40=171°，则外角度数=180-171=9°
2. 4.331
tan77°精确到千分位。tan77°=4.3314758742841555455461677545574，精确到千分位为4.331
3. 39.99≈40feet
求正40边形外角度数。
正40边形所有内角度数和=38*180°=6840，每个内角度数6840/40=171°，则外角度数=180-171=9°
2. 4.331
tan77°精确到千分位。tan77°=4.3314758742841555455461677545574，精确到千分位为4.331
3. 39.99≈40feet
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