Prove that in a triangle, other than an equilateral triangle, angle opposite the longest side is greater than 23 of a right angle.

Prove that in a triangle, other than an equilateral triangle, angle op

1.	Prove that in a triangle, other than an equilateral triangle, angle opposite the longest side is greater than 23 of a right angle.
Answer» Prove that in a triangle, other than an equilateral triangle, angle opposite the longest side is greater than $\frac{2}{3}$ of a right angle.