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# Recognizing angles

CCSS.Math:

## Video transcript

look at the diagram below that answer the following question what type of angle is the angle highlighted in the green below so it looks like two anteaters going after an ant right over here and this anteater is going straight down or at least on my screen looks like it's going straight down and this anteater is going straight to the left and so it looks like these this one's going straight down this one's going straight to the left it looks like this is a right angle or a 90-degree angle and so if I have to pick between any of these it looks most like a right angle looks like this is exactly going down and this is going exactly to the left that this is a 90-degree angle here and this was an acute angle then the angle between them would be smaller so maybe this top one would be coming in from this direction right over here photos obtuse this angle would be larger so let's check check our answer and try to do a few more of these which of the angles labeled in the diagram below are acute angles so just as a reminder an acute angle is less than 90 degrees so let's see a and B so our a and C both look larger than 90 degrees but B and D both look less than 90 degrees so B I'll go with B and D are the acute angles here let's do another one of these what type of angle is the angle highlighted in green below well this angle is less than 90 degrees if it was equal to 90 degrees this thing would come out like this so this is clearly less than 90 degrees this is an acute angle so let me just do one more this is a lot of fun select a symbol from the drop-down menu to complete the following statement then answer the question below angle a is less than 90 degrees less than 90 degrees what type of angle is angle a so angle a it's less than 90 degrees so an angle less than 90 degrees is an acute angle it was exactly 90 degrees it would be a right angle if it was larger than 90 degrees it would be an obtuse angle so I will go with acute angle we got it right