How can you prove a triangle is a right triangle?

Use the distance formula to see if at least two sides are congruent.

Use the slope formula to see if any sides are perpendicular.

Use the distance formula to see if all three sides are congruent.

Use the slope formula to see if any sides are parallel.

Question

How can you prove a triangle is a right triangle?
 
Use the distance formula to see if at least two sides are congruent.

Use the slope formula to see if any sides are perpendicular.

Use the distance formula to see if all three sides are congruent.

Use the slope formula to see if any sides are parallel.

anonymous · Answer

To me, I would choose the second one.

anonymous · Answer

are u sure

anonymous · Answer

@OOOPS

anonymous · Answer

How to say!! it's just "To me" hihihi

anonymous · Answer

lol ok can u help me with two more? @OOOPS

anonymous · Answer

Not sure. hihi

agreene · Answer

so, if you think about what it means to be perpendicular that would let you know rather a lot. Consider the following:|dw:1407461964881:dw|