tlong ya kk no 3 nya pleasee susah pke caranya kk mksih

3. (Diagonal 1 . Diagonal 2) : 2 = 150 cm
(15 . (3X+2)) : 2 = 150 cm
15 . (3X+2) = 2.150 cm
3X+2 = 300 cm/15
3X+2 = 20
3X = 20 - 2
X = 18/3
X = 6
Diagonal ke 2 =
3X + 2 =3.6 +2 = 20 cn