Jawabanmu

2014-05-29T21:44:43+07:00
Rumus = (d1 x d2) /2
a. ( 9 x 12 ) / 2 = 59 cm^2
b. ( 12 x 16 ) / 2 = 96 cm^2
c. ( 8y x 7y ) / 2 = 28 y cm ^2
1 4 1
2014-05-29T22:44:45+07:00
Rumus lbk = (d1.d2)÷2
A. rumus LBK= (d1.d2)÷2
(9.12)÷2 =>108÷2 = 54 cm
B. rumus LBK=(d1.d2)÷2
(12.16)÷2 =>192÷2= 96 cm
C. rumus LBK=(d1.d2)÷2
(8.7)÷2=> 56÷2= 28 cm
1 3 1