Question

Math by full process ​

Answer 1

Answer:

180

Step-by-step explanation:

Answer 2

Answer:

180°

Step-by-step explanation:

Let ABC be a triangle.

Through point A draw the line EF∥BC.

⇒ ∠ABC=∠EAB ....[ Alternate interior angles ]

⇒ ∠BCA=∠FAC ....[ Alternate interior angles ]

⇒ ∠EAB+∠BAC+∠FAC=180

o

....[ Linear pairs ].

By substituting ∠EAB=∠ABC and ∠FAC=∠BCA

⇒ ∠ABC+∠CAB+∠ACB=180

o

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∴ The sum of all the three angles in a triangle is 180

o

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HOPE IT HEPLS!