Question

prove the sum of three angle is 180 if the ​

Answer 1

Step-by-step explanation:

FROM Δ ABC  

draw a parallel line DE ║ BC

∠DAB + ∠BAC +∠CAE = 180

∠DAB = ∠ABC (ALTERNATE ANGLES ARE EQUAL)

∠CAE = ∠ACB (ALTERNATE ANGLES ARE EQUAL)

SO, ∠ABC + ∠ACB + ∠BAC =180

Answer 2

Answer:

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