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What is the sum of the interior angle measures in a 20-gon?

Answer 1

Allison Allen

Sum of all interior angles of #20#-gon is #3240^@#

Three things first.

Therefore #20#-gon has #20# exterior angles whose sum is #360^@#.

As such, sum of its all interior and exterior angles is #20xx180^@=3600^@#

Hence, sum of all interior angles is #3600^@-360^@=3240^@#

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Answer 2

Aaliyah Anderson

The sum of the interior angles of a polygon can be found using the formula ( (n-2) \times 180^\circ ), where ( n ) is the number of sides of the polygon. For a 20-gon, ( n = 20 ), so the sum of the interior angles is ( (20-2) \times 180^\circ = 18 \times 180^\circ = 3240^\circ ).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.