Question

Two prove that the sum of the
Angles of a triangle is 180
​

Answer 1

Answer:

1st side + 2nd side (greater) 3rd side

it is that like shape

Answer 2

Answer:

Step-by-step explanation:

1) Draw a construction DE which is parallel to the base BC of a triangle ABC

2) Assume angle 1 as angle ABC and angle 2 as Angle ACB and angle 3 as angle BAC

3) Angle DAB = Angle ABC = <1 { Alternate Interior Angles )

4) Angle EAC = Angle ACB = <2 ( Alternate Interior Angles )

5) So , <1 + <2 + <3 = 180 Degrees { Linear Pair )

6) Angle ABC + Angle BAC + Angle ACB = 180 ( From step 3 & 4 )

Hence we can conclude that the sum of all angles in a triangle is 180 degrees