Question

What is the angle between south-west and north-west?

• A. $0^o$
• B. ${45}^o$
• C. ${90}^o$
• D. ${180}^o$

Answer 1

The correct option is C ${90}^o$

South-west is midway between south and west along the arc, and north-west is midway between north and west.

It is depicted in the following figure:


$\therefore$ South-west and north-west directions are perpendicular to each other, i.e., included angle is ${90}^o.$