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S1 ACT11.1A Adjacent angles on a straight line

Autore:MrWat@SFCC(HK), Anton Coltham
Argomento:Angoli
1. What's adjacent angles? 2. Find the sum of 2/3 angles on a straight line. What's your conclusion? 3. What happen if the line segments AC and BC are not formed as a straight line?

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