Answer:
i dlnt know 15 I think not sure
Answer: y-8
Step-by-step explanation:
Answer:
10 sides.
Step-by-step explanation:
In geometry, a decagon is a ten-sided polygon or 10-gon. The total sum of the interior angles of a simple decagon is 1440°. A self-intersecting regular decagon is known as a decagram.
40
8x5=40
10x4=40
Hope this helps