In a triangle `A B C\ a : b : c=sqrt(3)\ :1\ :\ 1,` then the triangle is- right angled triangle (b) abtuse angled triangle acute angled triangle, which is not isosceles Equilateral triangle

In triangle ABC if 2sin^(2)C=2+cos2A+cos2B , then prove that triangle is right angled.

If in a triangle ABC, tanA+tanB+tanC>0 the triangle is (A) acute angled triangle (B) obtuse angled (C) right angled (D) none of these

In a triangle ABC, angle A = 60^(@) and b : c = (sqrt3 + 1) : 2 , then find the value of (angle B - angle C)

In a triangle A B C , if acosA=bcosB , show that the triangle is either isosceles or right angled.

Can an acute-angled triangled be a. and equilateral, b. an isosceles, and c. a scalene triangle ?

If a vertex, the circumcenter, and the centroid of a triangle are (0, 0), (3,4), and (6, 8), respectively, then the triangle must be (a) a right-angled triangle (b) an equilateral triangle (c) an isosceles triangle (d) a right-angled isosceles triangle

If vec xa n d vec y are two non-collinear vectors and A B C isa triangle with side lengths a ,b ,a n dc satisfying (20 a-15 b) vec x+(15b-12 c) vec y+(12 c-20 a)( vecx xx vec y)=0, then triangle A B C is a. an acute-angled triangle b. an obtuse-angled triangle c. a right-angled triangle d. an isosceles triangle

A triangle whose two sides are equal is called (a) an acute triangle (b) a scalene triangle (c) an isosceles triangle (d) an equilateral triangle

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?

A triangle whose all sides are equal is called (a) an equilateral triangle (b) an acute triangle (c) a right triangle (d) an isosceles triangle