S2 Maths

Question

1.Find each ext. angle of a regular 35gon

2.find each int. angle of a regular 25gon

Update:

3. what is decending order?

Answer 1

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1.

sum of ext. angle of a regular 35-polygon = 360度

所以 each ext. angle of a regular 35-polygon = 360/35度 = 10.285714度

2.

angle sum of a regular 25-polygon = (25-2)*180度 = 4140度

所以each angle of a regular 25-polygon = 4140/25 度 = 165.6度

所以each int angle of a regular 25-polygon = 360-165.6度 = 194.4度

3.

decending order = 增減次序

Source(s): 自己