9.1

Part of 1998 All-Russian Olympiad Regional Round

Problems(1)

a,b,c,2r in arithm. progression - All-Russian MO 1998 Regional (R4) 9.1

Source:

The lengths of the sides of a certain triangle and the diameter of the inscribed part circles are four consecutive terms of arithmetic progression. Find all such triangles.

geometryArithmetic Progression