If a,b and c are the lengths of the sides of a right triangle ABC with `c=2a` and `b^(2)-3a^(2)=0`, then `angleABC=……………………`

If the length of the sides of the triangle ABC satisfy, 2(bc^2+ca^2+ab^2)=b^2c+c^2a+a^2b+3abc , then triangle ABC is:

If cos A+cos B+2cos C=2, then the sides of triangle ABC are in

If a, b, c are the sides of the triangle ABC such that a^(4) +b^(4) +c^(4)=2c^(2) (a^(2)+b^(2)), then the angle opposite to the side c is-

If a, b, c are the sides of the triangle ABC such that a^(4) +b^(4) +c^(4)=2x^(2) (a^(2)+b^(2)), then the angle opposite to the side c is-

If a,b,c are the sides of a triangle ABC such that x^(2)-2(a+b+c)x+3 lambda(ab+bc+ca)=0 has real roots.then

If the sides of a triangle are b-3a+2c, a+3b-3c and 2a-b+c, then find its perimeter.

If the sides of a triangle are b-3a+2c, a+3b-3c and 2a-b+c, then find its perimeter.

If a, b, c are the sides of a triangle ABC such that x^2+2(a+b+c)x+3lambda(a b+b c+c a)=0 has real roots.then