Two coplanar congruent regular 15 -gons share a side in common, but have no interior points in common, as shown. What is the degree-measure of the angle marked $$\(x\)$$ ?
A.
24
B.
36
C.
48
D.
60
Exam No：2022 First Round Grades 8-9 Year：2022 Question No：21
Answer:
C
Knowledge points:
G8-9 - Geometry - Area Reasoning (Composite & Shaded Figures)
Solution:
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