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User Cleared
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1 Answer

19 votes
19 votes

Answer:

x = 144

Explanation:

Angle sum of heptagon = 900

5x + 90 + 90 = 900
5x + 180 = 900
5x + 180 - 180= 900 - 180
5x = 720
Divide both sides by 5
x = 144

User Fuglede
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