Acute, Small angles, less then 90 degrees, Obtuse, Angles that are greater then 90 but less then 180 degrees, Reflex, Larger angles, greater then 180 degrees, Right-angle, An exact 90 degree angle, Straight, Angles on a ______________ that add up to 180 degrees, Baseline, The straight edge of the protractor that lines up with one arm of the angle, Degrees, The unit used to measure angles, Protractor, The tool used to measure and draw angles, Vertex, The point where two lines meet to form an angle, Zero, The number you always start measuring from on a protractor, Inner, The scale used when the angle opens from left to right, Outer, The scale used when the angle opens from right to left

Angles and Protractors

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