Respuesta :

Answer:

Step-by-step explanation:

a²+b²=c²  rectangle

a²+b² < c²  obtuse

a²+b² > c²  acute

amna04352

Answer:

Obtuse

Step-by-step explanation:

8² = 4² + 5² - 2(4)(5)cos(theta)

cos(theta) = -23/40

Theta = 125.1°