Question

For constructing which among the following angles(in degrees) is a protractor not necessary?

• A. 25^∘
• B. 45^∘
• C. 40^∘
• D. None of these

Answer 1

The correct option is B

45^∘

The ${45}^{\circ }$ angle can be constructed by first creating a right triangle using set square and then bisecting this angle by angle bisector method. There is no need for a protractor.