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

ORP and ORN are a linear pair

Option A.

Step-by-step 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 =

  = 30°

Hence x = 30° is proved.

Option A. is the answer.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

answer: the answer is ann