210019
Description
Mind Map by heyitsmoule15, updated more than 1 year ago
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Created by heyitsmoule15
over 10 years ago
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Circle Theorems
- The angle at the center is double the one at the circumfrence
- The angle in the semi circle is 90*
- Angles in the same segment are equal
- Opposite angles in a cyclic quadrilatral add up to 180*
- Alternate segment rule
- An isosceles triangle is made by two radii
- Tangent meets a radius at 90*
- Tangents that meet at an external point are equal in length
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