Question

Six points are on circle. The number of
quadrilaterals that can be formed are:
a) 30 b) 360 c15 d) None​

Answer 1

Answer:

c)15

Step-by-step explanation:

it is better to use combinatorics

so of the 6 points you chose 4

that is ⁶C₄

which is  $\frac{6!}{4!2!}$

this equates to 6x5/2

this gives 15

you can always try it too by actual construction