Respuesta :
Use Pythagorean theorem
[tex]20 ^{2}=12^{2}+15^{2}[/tex]
Solve
20^2 = 400
12^2 = 144
15^2 = 225
400 = 144 + 225
400 > 369
Since C^2 was greater than A^2 and B^2, your triangle is obtuse
[tex]20 ^{2}=12^{2}+15^{2}[/tex]
Solve
20^2 = 400
12^2 = 144
15^2 = 225
400 = 144 + 225
400 > 369
Since C^2 was greater than A^2 and B^2, your triangle is obtuse
This would be acute, since the triangle had no sides greater than 90 degrees. All of the angles are less than 90 degrees and an acute triangle is less than 90 degrees. Also if it was a right triangle at least two sides would have to be equal. Hope this Helps:)))