Concept 5 of 8Foundation
Watch on YouTubeVideoComplementary, supplementary, linear pair
- Complementary: two angles that sum to 90°. Example: 30° + 60°.
- Supplementary: two angles that sum to 180°. Example: 110° + 70°.
- Linear pair: two angles on a straight line — they ARE supplementary.
- Vertically opposite angles: when two lines cross, angles directly opposite are EQUAL.
Example
One angle is 35°. Complement = 55°. Supplement = 145°.
💡 Tip:C = 'Corner' (90°). S = 'Straight' (180°). Alphabetical matches numerical.
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5 questions to check what you just read.
0 / 5
- Q1.Complement of 35°:
- Q2.Supplement of 70°:
- Q3.Two angles that sum to 180° are:
- Q4.Vertically opposite angles are:
- Q5.A linear pair sums to: