Write a paragraph proof for the following conjecture:
Given: m∠1 +m∠2=m∠4
Prove: m∠3 +m∠1 +m∠2=180°

Answer:
The answer to your question is given below.
Step-by-step explanation:
From the question given,
m∠1 + m∠2 = m∠4
To prove that:
m∠3 + m∠1 + m∠2 = 180°
We simply do the following:
m∠3 + m∠4 = 180°.... (1) (angle on a straight line)
But from the question given,
m∠4 = m∠1 + m∠2
Substitute the value of m∠4 into equation (1)
m∠3 + m∠4 = 180°
m∠3 + m∠1 + m∠2 = 180° QED