Which two equations relate the measure of ∠4, to the measures of ∠1, ∠2, and/or ∠3. A. m∠4 = m∠1 + m∠2
B. m∠4 = m∠2 + m∠3
C. m∠4 = 180° − m∠3
D. m∠4 = 180° − (m∠3 + m∠2)

A. m∠4 = m∠1 + m∠2

C. m∠4 = 180° − m∠3

So we can write

m∠4 = m∠1 + m∠2

And m∠4 + m∠3= 180°

m∠4 = 180° − m∠3

Therefore, the correct equations are :

A. m∠4 = m∠1 + m∠2

C. m∠4 = 180° − m∠3

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answer: a

step-by-step explanation:

you can't solve x because it is 2 linear equation and you only have one equation