Question

The sum of the three angles of a triangle is ​

Answer 1

Answer:

180 is the sum of three angles of a triangle

Answer 2

Answer:

180°

Step-by-step explanation:

lets take 2 parallel lines

and mark angles 1,2,3,4 and 5 respectively

here angle 2,4,and 5 are the angles of the triangle

now

angle 4 = angle 1           ( as lines are parallel so alternate angles

angle 5 = angle 3               and alternate angles are equal)

so we know that straight line makes 180°

so, angle 1 + angle 2 + angle 3 = 180 °

⇒angle 5 + angle 2 + angle 4 = 180°         as

so sum of all angles of a triangle is 180°