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Question

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


A
Heptagon,180
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B
Heptagon,1080
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C
Heptagon,108
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D
Heptagon,100
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Solution

The correct option is B $$Heptagon,1080$$
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
$$=(8-2)\times 180$$
$$=6\times 180$$
$$=1080$$

Mathematics

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