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✨ Jawaban Terbaik ✨

DEM=ADM(同底等高)
所以CDE=CDM+DEM=CDM+ADM=AMC
AMC=ABM(等底同高)
所以CDE=AMC=(1/2)ABC

https://www.youtube.com/watch?v=7V5Vv9RZenc&list=PLhLBQcgKdTSbfzJb19vE26fwESjbtIqJN&index=28

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