Polygons with 3 vertices, (triangle) = C(7,3) = 35
polygons with 4 vertices = C(7,4) = 35
polygons with 5 vertices = C(7,5) = 21
polygones with 6 vertices = C(7,6) = 7
polygons with 7 vertices = 1
add them up
IF THERE ARE 7 DISTINC POINTS ON THE PLANE WITH NO THREE OF WHICH ARE COLLINEAR, HOW MANY DIFFERENT POLYGONS CAN BE POSSIBLY FORMED?
1 answer