Question

please Answer this question

Answer 1

Answer:

by n(n-3)/2 you will get the no. of sides

it is 9 then you can calculate the interior angles

that is 140

Answer 2

Answer:

140°

Step-by-step explanation:

the number of diagonal equal to N ( n - 3 ) / 2

where n is number of sides

so by solving the equation

&

n ( n - 3 ) / 2 = 27

n^2-3n-54=0

we get,

( n - 9 ) ( n + 6 ) = 0

n - 9 = 0

n = 9

interior angle of a polygon equal to

180 ( n - 2 ) / n

so, 180 ( 9 - 2 ) equals to 1260

so, 1260 / 9 = 140°

ANSWER = 140°

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