What forms an angle?, Two rays with a common origin, One line segment only, Two unrelated points, What is the common origin of an angle's rays called?, The degree, The protractor, The vertex, Which unit measures angles?, Degree, Kilogram, Metre, Which instrument measures the size of an angle?, A thermometer, A balance, A protractor, What type of angle is 61°?, An acute angle, An obtuse angle, A right angle, What type of angle is 104°?, An obtuse angle, An acute angle, A straight angle, How many degrees is a straight angle?, 180°, 60°, 90°, How many degrees is each angle in a square?, 60°, 90°, 120°, How many degrees is each angle in an equilateral triangle?, 90°, 120°, 60°, How many degrees is each interior angle in a regular hexagon?, 60°, 120°, 90°

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