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Published byEdgardo Whitman Modified over 2 years ago

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Angles formed by opposite rays.

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Angles that share a common side and a common vertex, but have no common interior points.

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Two angle whose measures have a sum of 90 degrees. or

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Two angles whose measures have a sum of 180 degrees. or

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Name a pair of vertical angles. Name a pair of adjacent Angles. Name a pair of complementary angles. Name a pair of supplementary angles.

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When looking at a diagram, we can conclude: Vertical angles Adjacent angles Adjacent supplementary angles

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Angles or segments are congruent Angles are right angles Lines are parallel or perpendicular (unless there are marks that give this information)

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Draw two intersecting lines. Number the angles as shown. Use a protractor to measure each angle. Make a conjecture about vertical angles.

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If two angles are complementary to the same angle (or congruent angles), then the two angles are congruent.

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If two angles are supplementary to the same angle (or congruent angles), then the two angles are congruent.

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All right angles are congruent.

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