Obtuse: Larger than 90 °, 130°, , 92°, , Acute: Smaller than 90°, 45°, , 87°, , Right: makes a square corner, 90°, , Four of these makes a circle., one-fourth of a circle, Straight: A straight line or segment., 180°, as wide as two connected right angles, half of a circle, neither acute not obtuse,

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