B, D represent pairs of vertical angles.
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Other pairs may be congruent, but they are not vertical angles. The lines that look parallel must be assumed to be NOT parallel, because they are not marked in the diagram as being parallel. Thus ∠8 ≠ ∠12, for example.
You convert the whole number into a fraction by adding a one underneath it, after that you multiply across.
Answer
0
Explanation
Formula for sum of interior angles:
(n - 2) • 180 = sum = 2205 °
Where n = number of sides
2205/180 = n - 2
12.25 = n - 2
14.25 = n
Answer is 0 as you can’t have a quarter of a side
