Question

answer
isosceles acute
isosceles obtuse
scalene right
scalene obtuse
equilateral
isosceles right
scalene acute

Explanation:

Step1: Analizar longitudes de lados

Observamos que $NL = LM=MN = 5.75$.

Step2: Analizar ángulos

Los ángulos internos son $60^{\circ}$.

Answer:

B. Equilateral