Question

to find the sum of angles of a triangle 180°​

Answer 1

Step-by-step explanation:

By angle sum property,

angle A +angle B + angle C =180degree

Answer 2

Answer:

the sum of the interior angles of a triangle is 180°

Angles B and B' are corresponding angles, ... 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°.

Step-by-step explanation:

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