The angle of a triangle ABC are in A.P . If the number of degree in the smallest angle and the number of radians in the greatest angle are in the ratio of 60:π. Find the angle in degrees.
Let T be the set of all triangles in the plane and let a relation R on T be defined as aRb .If a is congruent to b AA a b in T then show that R is reflexive symmetric and transitive.