The 4 types of angles are right angle, acute angle, obtuse angle and straight angle. On a protractor (an instrument used to measure angles), a right angle measures 90 degree. an acute angle measures less than 90 degree (that is from 90 degree to 0 degree), an obtuse angle measures more than 90 degree (that is from 90 degree to 180 degree) and a straight angle measures 180 degree.
I hope my answer helped you.
WISH YOU ALL THE VERY BEST IN YOUR FUTURE.