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Classes
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Grade 6
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Angles and constructions
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Intersecting lines
Intersecting lines
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Concept 1 of 3 · no score 🙂
Opposite angles are equal
One angle gives you all four
53°
53°
127°
127°
opposite angles are EQUAL
neighbours make 180°
perpendicular = crossing at exactly 90° · parallel lines never cross at all
53 + 127 = 180, and the pairs across the crossing
match
.
1
Two crossing lines make four angles.
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