The sum of angles of a triangle formed in spherical geometry is greater than 180o.
If one angle of a triangle is greater than the sum of the other two, show that the triangle is obtuse angled.
Question 74
State whether the statement is True or False.
Sum of any two angles of a triangle is always greater than the third angle.
Question 75
The sum of the measures of three angles of a triangle is greater than 180∘.
Which of the following statements are not correct?
a) The sum of any two sides of a triangle is greater than the third side. b) A triangle can have all its angles acute. c) A right-angled triangle cannot be equilateral. d) The difference of any two sides of a triangle is greater than the third side.