Answer:
Explained
Explanation:
Protectors are preferred to ruler while measuring angles. Rulers are generally used to measure linear distances, whereas protector are use to measure angle between two lines. Protectors usually have two sets of numbers in Opposite directions. We need to be careful while measuring the angle. whenever, I am in doubt i think like " is this angle greater or less than 90°" this helps to choose the required set of number between the two.