State a true conclusion.

1) if two planes intersect, their intersection is a line.

2) plane rand plane s intersect.

conclusion:

i think 1: 2

step-by-step explanation:

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

where is abdul's work? don't see that anywhere posted : /

step-by-step explanation: