Jawabanmu

2014-06-05T20:49:10+07:00
A.12cm.8cm :2 :48cm
b.9cm.16cm :2 :72 cm
c.15cm.18cm:2 :135cm
d.13cm.21cm :2 :136,5
2014-06-05T20:52:23+07:00
A.1/2x8x12= 48cm
b.1/2x9x16=72cm
c.1/2x15x18=135cm
d.1/2x13x21=126,5cm