1) An acute angle is a) an angle less than 90∘ b) an angle more than 90∘ c) an angle more than 180∘ d) an angle more than 360∘ e) 90∘ 2) An obtuse angle is a) an angle less than 90∘ b) an angle more than 90∘ c) an angle more than 180∘ d) an angle more than 360∘ e) 90∘ 3) A straight angle is a) an angle less than 90∘ b) an angle more than 90∘ c) 180º d) an angle more than 360∘ e) 90∘ 4) A right angle is a) an angle less than 90∘ b) an angle more than 90∘ c) an angle more than 180∘ d) an angle more than 360∘ e) 90∘ 5) What kinds of angles are these? a) obtuse - right - acute b) right - obtuse - acute c) acute - right- obtuse 6) Is this a straight angle? a) YES b) NO 7) What is this angle measure? a) 130º b) 90º c) 180º 8) What is this angle measure? a) 90º b) 30º c) 110º 9) What is this angle measure? a) 90º b) 80º c) 150º 10) What is this angle measure? a) 120º b) 45º c) 150º

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