Answer:
Step-by-step explanation:
triangle: a+b>c. If two lengths are put together, and equals more than the length of the third side, then it's a triangle
right triangle: a2+b2=c2 if the square of the two lengths equal the square of the third, then it's a right triangle
acute triangle: a2+b2>c2 if the square of the two lengths are greater than the square of the third it's acute
obtuse triangle:a2+b2<c2 if the square of the two lengths are less than the square of the third it's obtuse
