(5*4+2*3+0.5*3*2) Ax = 20*(5/2) + 6.5*6 + 6*3 => Ax = 3.69
(5*4+2*3+0.5*3*2) Ay = 20*(4/2) + (2+(2/3))*6 + 6*1 => Ay = 1.86
Ax+Ay = 5.55
4. 如右圖所示 ,A點為該圖形的形心位置,則 a + b 為何?(A) 5.3..-阿摩線上測驗