21080530
Description
Mind Map by lizabeth rawson, updated more than 1 year ago
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Created by lizabeth rawson
almost 6 years ago
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Parallel lines
- When a line crosses two parallel lines, it forms sets of angles
- The two bunches of angles formed at the points of intersection are the same
- There are only actually two different angles involved and they add up to 180 (a and b)
- vertically opposite angles are equal eg b and b
- vertically opposite angles are equal eg b and b
- There are only actually two different angles involved and they add up to 180 (a and b)
- The two bunches of angles formed at the points of intersection are the same
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