a) What is a regular polygon of $7$ sides called?
b) What is the sum of interior angles of a regular octagon?

H e p t a g o n, 180

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H e p t a g o n, 1080

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H e p t a g o n, 108

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H e p t a g o n, 100

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Solution

The correct option is B $H e p t a g o n, 1080$
a) Regular polygon of $7$ sides is called as Heptagon
b) Sum of interior angles of a regular polygon of n sides $= (n - 2) \times 180$
Sum of interior angles of a regular octagon
$= (8 - 2) \times 180$
$= 6 \times 180$
$= 1080$

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