Question

all angles of a 9sided polygon are equal
calculate one outer angle.
calculate the inner angles.
write the sum of all inner angles
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Answer 1

Answer:

a)140°

b)40°

c)1260°

Step-by-step explanation:

Each interior angle = n-2 * 180/n= 9-2*180/9 =7*20=140

Each exterior angle = 180- 140 (linear pair) = 40

Sum of interior angle = n-2 *180=9-2*180 =7*180= 1260°

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