If in a` /_\ABC, sin^2A+sin^2B+sin^2C=2, then /_\ `is always a an (A) isosceles triangle (B) right angled triangle (C) acute angled triangle (D) obtuse angled triangle

Classify these triangles as right, acute or obtuse angled triangle.

For a /_\ABC, if cotA.cotB.cotCgt0 , then nature of the triangle is (A) acute angled triangle (B) right angled triangle (C) obtuse angled triangle (D) none of these

Is the triangle, whose vertices are (5, -6), (1, 2) and (-7, -2) , a right-angled triangle, an acute-angled triangle or an obtuse-angled triangle?

In Delta ABC, if sin^(2)A+sin^(2)B=sin^(2)C then the triangle is

If in a Delta ABC,tan A+tan B+tan C>0 then (A) Delta is always obtuse angled triangle (B) Delta is always equilateral triangle (C) Delta is always acute angled triangle (D) nothing can be said about the type of triangle

ABC is a isosceles right angled triangle, right angled at C. prove that AB^(2) = 2AC^(2)

In triangle ABC, if sin^(2)A+sin^(2)B=sin^(2)C then the triangle is

the triangle ABC,3A=2B and 2A=C . find the angles of the triangle