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a) 45 degrees
b)180 degrees
c)60 degrees
d)90 degrees

Hi! I believe its 90 degrees because it forms a right angle.

Step-by-step explanation:

d)90 degrees i think it is that one

1 is c

2 is a

3 is a

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°