sameoldalex
sameoldalex sameoldalex
  • 20-10-2021
  • Mathematics
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j808389495 j808389495
  • 20-10-2021
1. 180°-∠CBE=90°,90°=∠ABC,90=2x+3x,90=5x,x=18,∠ABD=36°,∠DBC=54°
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