Question 20 Prove that in a triangle, other than an equilateral triangle, angle opposite the longest side is greater than 23 of a right angle.

Question 20 Prove that in a triangle, other than an equilateral triang

1.	Question 20 Prove that in a triangle, other than an equilateral triangle, angle opposite the longest side is greater than 23 of a right angle.
Answer» Question 20 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.