Question 1035148

Ans. Yes.

To check whether given coordinates form a triangle ,you can check either of this 
1. All 3 points are non-collinear
2. Area of a triangle is non-zero
3. Sum of 2 sides is greater than 3rd side and difference of 2 sides is less than third side

In the give problem, clearly we are getting right angled triangle as there is 
one line on x-axis of 3 units,
One line on y-axis of 4 units and making an angle of 90 degrees.
  Both giving rise to 3rd line as hypotenuse of 5 units.