Question

(which of these angles we cannot construct it using ruler and compass a) 120 b)70 c) 60 d) all can be constructed
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Answer 1

Answer:

b)70

Step-by-step explanation:

70 degree as it is not standard angle

Answer 2

70°

Option(b) is the correct answer.

• We can construct solely those angles employing a ruler and a compass which are divisible by 15.
• For example, we can construct angles like 15°, 30°, 45°, 60°, and so on.
• This is because we can make a perpendicular bisector using a compass which helps us to divide the angles and lines into two equal parts. The half of 180°, 90°, 45°, and so on are all divisible by 15. Other angles cannot be drawn using a compass.
• But 70° is not divisible by 15. So, we cannot draw it using a ruler and a compass.

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