Step-by-step explanation:
The most remarkable and important property of triangles is that any polygon can be split up into triangles simply by drawing diagonals of the polygon. This fact forms the basis for understanding why the interior angles of polygons add up to 180(n-2) degrees.
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The answer is 4. I hope this helped.
Answer:
Follows are the answer to the given point.
Step-by-step explanation:
In point 1:


In point 2:


In point 3:


In point 4:

