Question

how to do this question..plz help me out..​

Answer 1

Answer:

Step-by-step explanation:

Sum of all angles of a triangle is 180

Answer 2

Answer:

Here is your answer

Step-by-step explanation:

Given,

DE || BC

To prove,

Angle 1 + Angle 2 + Angle 3 = 180°

Proof,

Here,

As line DE || BC

Angle 4 = Angle 2 - - - - - - 1️⃣

Similarly,

Angle 5 = Angle 3

- - - - - - 2️⃣

Here,

Angle 4 +Angle 5 + Angle 1 = 180 °----- 3️⃣

Therefore,

Angle 1 + Angle 2 + Angle = 180°. By eq 1, 2, and 3.

Hence proved.

PLZ check and Consult.