Jawabanmu

2014-05-20T13:50:41+07:00
X = 3 cm. jd yg paling panjang adlh sisi yg (3x+1)
2014-05-20T13:51:06+07:00
2x + (2x + 2 ) + ( 3x + 1 ) = 24 
7x + 3 = 24
7x = 21
x = 3
a = 2x = 2 (3) = 6 cm
b = 2x + 2 = 2 (3)+ 2 = 8 cm
3x + 1 = 3 (3) + 1 =10 cm
jd sisi terpanjang adl 10 cm