9514 1404 393
Answer:
a) 720°
b) 98
Step-by-step explanation:
a) The sum of interior angles of an n-gon is (n-2)×180°. For n=6, the sum is ...
(6 -2)×180° = 4×180° = 720°
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b) The sum of the marked angles is 622°, so the value of x is ...
x = 720 -622
x = 98
