How many triangles can be formed by joining angular points of a decagon? How many diagonals have it?
Answers
Answered by
1
Answer:
when we join a decagon their will be 10C3=1
Answered by
15
Answer:
In a decagon, by joining one vertex to the remaining vertices you can have 8 triangles. If you are considering all the vertices independently you will have a total of 8*10 = 80 triangles.
- You can figure out this way: the sum of the interior angles of a decagon = (2n-4)*right angles or (n-2)*triangles. So a decagon will form 8 triangles.
Hope it will be helpful ✌️
Similar questions