Question

I have one confusion that, we have to see upper or lower part of protractor​

Answer 1

Answer:

here is your answer that side your yellow color is=130degree and 50degree.

and 90 is the upper side

and your blue color question is =160degree,20degree.

online aa jao please

Answer 2

Answer:

Well the fact is that in lower classes we study angles that can be measured from the lower part coz these start from the RHS but as the angle can be drawn from both side and for our convenience we are given two rows so that we don't have to calculate the angle starting from lhs. in general we see from lower part of protractor.