Answer:
acute
Step-by-step explanation:
Given the 3 sides of a triangle a, b, c ( where c is the longest )
• If a² + b² = c² ⇒ right triangle
• If a² + b² > c² ⇒ acute angled triangle
• If a² + b² < c² ⇒ obtuse angled triangle
Here a = [tex]\sqrt{11}[/tex], b = [tex]\sqrt{7}[/tex] , c = 4
c² = 4² = 16
a² + b² = ([tex]\sqrt{11}[/tex] )² + ([tex]\sqrt{7}[/tex] )² = 11 + 7 = 18
Since a² + b² > c² then triangle is acute
