Complementary angles
Two angles are complementary if their sum equals 90°. The green and blue angles are complementary.
Supplementary angles
Two angles are supplementary if their sum equals 180°. The yellow and orange angles are supplementary.
Sum of angles in a triangle
In a triangle, the sum of the 3 angles is always equal to 180°.Angles, alternate interior angles, alternate exterior angles, vertically opposite angles and corresponding angles
Finally, you can add to your culture the following notions. |
Vertically opposite angles |
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Alternate interior angles |
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Alternate exterior angles |
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Corresponding angles |
See also : geometry on fmaths.com