An angle that is less than 90 degrees., Acute angle, An angle that is exactly 90 degrees., Right angle, An angle that is more than 90 degrees but less than 180 degrees., Obtuse angle, To look at two or more things and say how they are the same or different., Compare, Units we use to measure angles., Degrees, To guess a number or size without measuring exactly., Estimate, Something that is more or bigger., Greater, A tool used to measure angles in degrees and to draw angles, Protractor

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