The size of the interior angle of a regular decagon...Need an answer ASAP

Step-by-step explanation:

The exterior angle of a regular n-sided polygon is given by

Exterior angle = 360/n  

The interior angle is therefore the supplement of the exterior angle,

Interior angle = 180 - 360/n

for n=10, decagon,

Interior angle of a decagon = 180 - 360/10 = 180-36 = 144 degrees

180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.