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Parallel line theorems: F, Z and C patterns (TPT)
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Learn it Transversal Parallel Theorems: TPT-F (corresponding angles, F shape) are equal; TPT-Z (alternate angles, Z shape) are equal; TPT-C (co-interior angles, C shape) add to 180°.
Example: Find x.
- The two angles make a Z shape across the transversal.
- TPT-Z: alternate angles are equal.
- x = 65°.
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