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Work out the sum of the interior angles of: a heptagon (7 sides) a nonagon (9 sides) a decagon (10 sides)
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22 votes
Work out the sum of the interior angles of:

a heptagon (7 sides) a nonagon (9 sides)
a decagon (10 sides)

User Jinna Baalu
by
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1 Answer

8 votes

Answer:

heptagon- 900

Nonagon- 1260

Decagon- 1440

Step-by-step explanation: n-2 x 180 degrees is the formula where n is the number of sides

User Nsdiv
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