Math Dictionary Definitions for Angles
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 Angles: an angle is the rate of spread or distance between two lines, which are connected at one point. Angles are measures in radians, degrees, and gradients. Alternate angles: Alternate angles are two angles that form a Z-like shape. Alternate angles are formed when a line crosses two parallel lines on a slant. The 2 acute angles at where the slanted line crosses both parallel lines are equal, and called alternate angles. Co-interior angles: Co-interior angles are two angles on the same side of a 'C' like shape which can be slanted. The sum of two co-interior angles is always 180º. Complimentary angles:Complimentary angles are two or more angles which are equivelent to exactly 90º. Supplementary angles: Supplementary angles are two or more angles which are equivelent to exactly 180º. Corresponding angles: Corresponding angles are two angles that form an 'F' like shape. Corresponding angles are created when a line crosses two parallel lines. The angles which are the same are the 2 obtuse angles. You can see a diagram of Corresponding angles at the bottom of this page. Opposite angles: Opposite angles are two angles that share a vertex. Opposite angles are always equal, and are formed when two straight lines intersect.The angle striaght across from an angle is the same size as that angle. Reflex angle: A reflex angle is an angle that is larger than 180º. Right angle: A right angle is an angle of exactly 90º. Straight angle: A straight angles is an angle of exactly 180º. Acute angle: an acute angle is an angle which is smaller than 90º. Obtuse angle: An obtuse angle is an angle that is smaller than 180º, but larger than 90º.

 Corresponding Angles

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