249 A 30-60-90 trangle with extension line for half angle identity

248 A 30-60-90 trangle

247 Show that the diameter of the inscribed circle of a triangle

246 y=(1/x^2)+1/(x+2)^2-10/9 graph

245 Curve of y = \dfrac{x}{(x+0.1)(x+0.2)}

244 the longest altitude BE is equal to the median CD in length for solution

243 the longest altitude BE is equal to the median CD in length

242 A trangle with bisector of one internal angle and circumcircle

241 A trangle with bisector of one internal angle and auxiliary line

240 A trangle with bisector of one internal angle

239 Verify that the length from any point in a right triangle to the endpoints

238 Given BD bisects ∠ABC, ∠A+∠C=180° $. Prove AD=DC