Question

Which of the following angle may not be constructed using compass?

(a) 30° (b) 135° (c) 110° (d) 75°​

Answer 1

Which angle Cannot be constructed by a compass?

But as we can't form angle of 20 ° with help of compass , So we can't form angle of 5 ° , 10 ° , 20 ° , 40 ° , 50 ° , 70 ° , 80 ° , ... with the help of compass . those angles which do not come in the divisibility series of 360/2or3 cannot be made with the help of compass or ruler.

Answer 2

Answer:

As we form these angle by dividing our angles in two equal parts . But as we can't form angle of 20 ° with help of compass , So we can't form angle of 5 ° , 10 ° , 20 ° , 40 ° , 50 ° , 70 ° , 80 ° , ... with the help of compass .