Tolong bantu pr fiisika kelas XI nya dong ka..

Tolong bantu pr fiisika kelas XI nya dong ka..

1. koordinat kotak persegi bawah (1 , 1)

2. koordinat kotak persegi atas (1 , 3)

3. koordinat kotak persegi panjang kanan (5 , 1)

A1 = 2 x 2 = 4

A2 = 2 x 2 = 4

A3 = 6 x 2 = 12

$x = frac{(x1 times a1) + (x2 times a2) + (x3 times a3)}{a1 + a2 + a3} \ x = frac{(1 times 4) + (1 times 4) + (5 times 12)}{4 + 4 + 12} \ x = frac{4 + 4 + 60}{20} \ x = frac{68}{20} \ x = 3.4$

$y = frac{(y1 times a1) + (y2 times a2) + (y3 times a3)}{a1 + a2 + a3} \ y = frac{(1 times 4) + (3 times 4) + (1 times 12)}{4 + 4 + 12} \ y = frac{4 + 12 + 12}{20} \ y = frac{28}{20} \ y = 1.4$

koordinatnya (x , y) = (3.4 , 1.4)