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Vertical Angles
When two lines intersect they form 4 angles Angles opposite each other are vertical angles Two intersecting lines create two sets of vertical angles -
Vertical Angles - Video
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Complementary and Supplementary Angles
Complementary Angles => sum of two angles equals 90 degrees Supplementary Angles => sum of two angles equals 180 degrees -
Complementary and Supplementary Angles - Video
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Parallel Lines Cut by a Transversal
Parallel lines never intersect Transversal is a line that crosses parallel lines They form 8 angles -
Parallel Lines Cut by a Transversal - Video
