Math Vocab

By: Tristian Whigham

Straight Angles

Angles which measure exactly 180° (degrees) are straight angles. Therefore, straight angles are straight lines. Angles are represented by the sign ϴ, called theta. That is, for straight angles, ϴ= 180°.

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Right Angles

Angles that are exactly at 90°
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Obtuse Angles

Angles that are more than 90° but less than 180°
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Reflex Angles

Angles that are more than 180° but less than 360°
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Adjacent Angles

Angles that share the same vertex, and have a common side
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Complementary Angles

When two angles add up to 90°
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Supplementary Angles

When two angles add up to 180°
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Vertically Opposite Angles

Vertically opposite angles are the angles opposite to each other when two straight lines intersect. Their defining property is that, vertically opposite angles are equal in magnitude.
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Corresponding Angles

When two parallel lines are crossed by a line called the transversal, the angles formed which are in corresponding positions, are called corresponding angles. Corresponding angles are equal in magnitude.
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