A right angle is 90 degrees.
An acute angle is less than 90 degrees.
An obtuse angle is more than 90 degrees but less than 180 degrees.
A straight line is 180 degrees.
Here are some useful websites to help you.
http://www.bbc.co.uk/skillswise/quiz/ma33angl-e3-quiz
Let me know how you found the quiz.
http://www.free-training-tutorial.com/angles-games.html
http://www.factmonster.com/math/knowledgebox/
Protractor and Angles
http://www.amblesideprimary.com/ambleweb/mentalmaths/protractor.html
http://www.mathplayground.com/measuringangles.html
http://www.mathsisfun.com/geometry/protractor-using.html
http://www.mathsteacher.com.au/year7/ch08_angles/02_draw/draw.htm
remember!
Here are some useful games to help you
practice!
http://www.free-training-tutorial.com/decimal-games.html
http://gamequarium.com/decimals.html
http://www.kidsmathgamesonline.com/numbers/decimals.html