依题意,可知A(2,0),B(2,2),C(0,2)
抛物线表达式 y = a(x - 2)²
因为,抛物线经过点C(0,2):2 = a(0 - 2)² = 4a,a = 1/2
y = (x - 2)²/2
(1) P(m,0),Q(0,6 -m)
OP = QM = m
OQ = PM = 6 - m
l = 2m+ 2(6-m) = 12
(2)
①m = 2时,P(2,0)在OA上或与A重合,Q(0,4)在BC上方.
0≤ < m ≤ 2时,重叠部分为正方形中的x 2
(4)二者均为直角三角形,只需一个锐角相等即可.
m = 3 - √5或m > 2