![(USS 5)](/media/m/5/8/d/58d23fb31c05623000b481f19334e64d.png)
Given
![5](/media/m/e/a/3/ea36c795dac330f34d395d8364d379b6.png)
points in the plane, no three of which are collinear, prove that we can choose
![4](/media/m/d/a/6/da6087359ae47e86dcb2e49565050046.png)
points among them that form a convex quadrilateral.
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$(USS 5)$ Given $5$ points in the plane, no three of which are collinear, prove that we can choose $4$ points among them that form a convex quadrilateral.