Question

prove that the sum of all the three angles of triangles is 180 degrees​

Answer 1

Answer:

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.

⚡Hope it will help you.⚡

Answer 2

Answer:

answer refer to the attachment.

see the attachment mate