There are $10$ points in a plane,out of which $4$ are collinear. How many straight lines can be formed by joining any two of these points?

There are $8$ points in a plane,out of which $4$ are collinear. How many triangles can be formed by joining these points?

The number of diagonals of a polygon is $35$. If $A$ and $B$ are two distinct vertices of this polygon,then the number of all those triangles formed by joining three vertices of the polygon having $AB$ as one of its sides is:

There are $11$ points in a plane,of which $5$ points are collinear. The total number of distinct quadrilaterals that can be formed with vertices at these points is:

$A$ regular polygon has $170$ diagonals. Then the measure of the interior angle of the polygon is

There are $3, 4,$ and $5$ points on the sides $AB, BC,$ and $CA$ of a triangle $ABC$ respectively. How many triangles can be formed using these points as vertices?