00:01
So this is a polygon with one, two, three, four, five, six, seven, eight, nine, ten sides.
00:06
So this is called a do, or it's just called a decagon.
00:12
Okay.
00:12
So in this decagon, i want to know how many diagonals with a common vertex.
00:17
So if i use the same vertex using those diagonals.
00:22
So for example, i can connect vertices like so.
00:27
If they all have the same vertex, how many triangles can i form? okay.
00:30
So i can't connect one with 10 or one with three because i need to form a triangle that has three sides...