how do you name a obtuse angle
when you are naming an angle just look for where the angle occurs and when writting it place it in the middle of the three points and draw a little triangle thingy over the top for eg. angle ABC would mean the angle occurs at B
If it is bigger than a 90 degress.(Is bigger than a right angle) Which means it is exactly perfect in the corner. Like an L. The corner i s a right angle. So if it was bigger than that it would be an obtuse angle.