Question

the sum of three angle of a triangle 160 degree​

Answer 1

Answer:

false

the sum of three angle of a triangle is 180°

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Answer 2

Step-by-step explanation:

Correct option is

B

180

o

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

.

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

o

.

Hence, option B is correct.

solution