Jawabanmu

2014-06-03T19:14:55+07:00
L 1/4O= 1/4 x LO
=1/4 x 22/7 x 7 x 7
=38,5 cm^2
L = 1/2 x a x t
= 1/2 x 7 x 7
= 24,5 cn^2
2014-06-03T19:18:01+07:00
A. 360/90.22/7.7.7=616 cm
b. 1/2.7.7=25,5 cm