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Answer:
at first you calculate remaining angle in triangle CDE 180-(61+41) then you proceed in lower triangle
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Answer:
ACB∡=78°
ABC∡=52°
Step-by-step explanation:
DCE∡+CDE∡+DEC∡=180 {angles in a triangle}
DCE∡=180-61-41=78
DCE∡=ACB∡ {vertically opposite angles}
ACB∡=78°
ACB∡+ABC∡+BAC∡=180 {angles in a triangle}
ABC∡=180-50-78
ABC∡=52
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