Solution:
In the decagon there are 10 vertices.Also, for a triangle it requires three vertices at a time.
Therefore, from 10 given points we have to choose 3 out of them.
Number of triangle =
MathematicsThe number of triangles formed in a decagon are ____.
The number of triangles formed in a decagon are ____.
Also, for a triangle it requires three vertices at a time.
Therefore, from 10 given points we have to choose 3 out of them.
Number of triangle =
