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How many times does each line segment in a polygon intersect?
I want to say 2, once at each corner
Why do a polygon can be used only once?
A polygon can be used infinitely many times!
What is the area of a four-sided polygon?
The area of a four-sided polygon is base times height.
If a polygon has 13 sides how many times does a triangle go into it?
13 triangles will go into a 13-sided polygon.
How do you find how many diagonals in a shape?
That's easy enough. In any n-sided polygon, each of the n verticies is the endpoint of n - 3 diagonals, because any of the other endpoints is a different vertex on the polygon, other than the the opposite endpoints on the sides to which the vertex belongs.At the same time, if you do this, all the diagonals are counted twice, because segment AB is the same as segment BA. Therefore, you divide by 2 and get n(n - 3)/2.So, for example, consider the pentagon. Each of the five vertices has two others with which a diagonal could be drawn, because there's four other vertices and two already have this one for a side. So five times two is ten, but each was counted twice, so we divide by two, and half of ten is five, the correct answer.
