Subject :IMO Class : Class 7

Which of the following statements is true ?

(A) If in a triangle, two angles are equal to 60°, then it is equilateral.

(B) If the angles of triangle are in the ratio 1 : 1 : 2 then it is a right angled isosceles triangle.

(C) If the angles of a triangle are in the ratio 1 : 2 : 3 then it is a right angled triangle.

(D) All of these.