The angles of a triangle are in AP and the ratio of the number of degrees in the least to the number of radians in the greatest is 60: π. Find the angles in degrees and radians.
Let the angles of the triangle be (a – d)°, a° and (a + d)°. Then,
(a – d) + a + (a + d) = 180°
⇒ 3a = 180°
⇒ a = 60°
So, the angles are (60 – d)°, 60°, (60 + d)°.
It is clear that, (60 – d)° is the least angle and (60 + d)° is the greatest angle.
Now, greater angle = (60 + d)° =
It is given that,
Hence, the angles are (60 – 30)°, 60°, (60 + 30)° i.e., 30°, 60°, 90°.