4 Let be a triangle and a circle be drawn lying outside the triangle, touching its incircle externally, and also the two sides and . Show that the ratio of the radii of the circles and is equal to S
4 Hayaan ay isang tatsulok at isang bilog isasagawa sang nakahiga sa labas ng tatsulok, paghawak nito incircle panlabas, at din ang dalawang panig at . Ipakita na ang ratio ng radii ng bilog at ay pantay-pantay sa S