Your answer would be option 2. Use the slope formula to see if any sides are perpendicular. This is because a right triangle must have 2 perpendicular sides that form a 90° angle for it to be a right triangle, so finding these would prove it.
I hope this helps!
Answer:
2
Step-by-step explanation:
Hope this helps, been doing it all my life! :P
Answer: 7.83
Step-by-step explanation:
