Geometry Problem 1287
Elements: Isosceles Triangle, 40-100-40 Degrees, Congruence,
Area, Metric Relations, Measurement.
In an isosceles triangle ABC, the measure of angle B is 100 degrees, AB =
BC = a, and AC = b. Prove that: (1) a3 + b3 = 3a2b; (2)
This entry contributed by Sumith Peiris, Moratuwa, Sri Lanka.
View or Post a solution