Question

Which statement could be used in step 2 when proving x = 30

Answer 1

Answer: ORP and ORN are a linear pair

Answer 2

Option A.

Explanation:

Statements Reason

1). m∠ORP = 80°, m∠ORN = (3x + 10)° Given

2). m∠ORP + m∠ORN = 180° ∠ORP & ∠ORN are linear pair

80 + (3x + 10) = 180

3x + 90 = 180

3x = 180 - 90

3x = 90

x =
`(90)/(3)`

= 30°

Hence x = 30° is proved.

Option A. is the answer.