Answer:
Step-by-step explanation:
104
diagonals, as each vertex has diagonals to all other vertices except itself and the two adjacent vertices, or n − 3 diagonals, and each diagonal is shared by two vertices.
...
Polygons.
Sides Diagonals
15 90
16 104
17 119
18 135
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♀️
Answer:
104
♀️
Step-by-step explanation:
104
diagonals, as each vertex has diagonals to all other vertices except itself and the two adjacent vertices, or n − 3 diagonals, and each diagonal is shared by two vertices.
...
Polygons.
Sides Diagonals
15 90
16 104
17 119
18 135