四边形ABCD是一个直角梯形,角A等于90度,它的上底DC=2厘米,DA=5厘米,AB=10厘米.如果三角形PBC的面积等于梯形APCD的面积,那么PB=多少厘米?(D+o9i5x7n,G8b/j*e(?6R6b2e
(D+o9i5x7n,G8b/j*e(?6R6b2e
算式:提示6^-o-q7M9|-S;T2\(D+o9i5x7n,G8b/j*e(?6R6b2e
答:PB的长度为,B8~3~+Y9G9R9L0S4q:[(]8C厘米。(D+o9i5x7n,G8b/j*e(?6R6b2e