RT △ ABC, in which the angle a is 90 ° and BC is 4, there is an internal angle of 60 ° and the point P is different from the point AB on the straight line AB, and ∠ ACP = 30 °, then the length of Pb is longer

RT △ ABC, in which the angle a is 90 ° and BC is 4, there is an internal angle of 60 ° and the point P is different from the point AB on the straight line AB, and ∠ ACP = 30 °, then the length of Pb is longer

Because ∠ ACP = 30 °, point P is different from a point of AB on the straight line AB, so, in the triangle CPB, Pb = PC, and because the triangle APC is RT △ and ∠ ACP = 30 °, CP = 2ca, that is, BP = 2AP = 2 / 3AB, in RT △ ABC, BC = 4, ∠ B = 30 °, so AC = 2, ab