Right Angle, Measures 90 degrees, Acute Angle, Measures between 0 and 90 degrees, Obtuse Angle, Measures between 90 and 180 degrees, Straight Angle, Measures 180 degrees, Perpendicular line, Line that intersect at right angle, Transversal Line, a line that intersects two or more other (often parallel ) lines, Interior, Inside, opposite of exterior, Congruent, All their measurement is identical, Angle, Space between 2 intersecting surfaces and close to the point they meet, Alternate, Indicates that each angle are on opposite of a line.

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