Question

How can i prove that 3 angles of a triangle equal to 180 degree?

Answer 1

Answer:

So, the angle sum ∠A + ∠B + ∠C is equal to the angle sum ∠A' + ∠B' + ∠C'. The three angles A', B', and C' form together a straight angle (they are along the line l). So, their angle sum is 180°.

Answer 2

Question ⤵️

How can i prove that 3 angles of a triangle equal to 180 degree?

Answer ⤵️

the angle sum ∠A + ∠B + ∠C is equal to the angle sum ∠A'

+ ∠B' + ∠C'. The three angles A', B', and C' form together

a straight angle (they are along the line l). So, their angle

sum is 180°.

Hope it helps you ✌️

Step-by-step explanation:

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