Jawabanmu

2014-06-10T22:41:22+07:00
L=axt
a= 10+8=18
jadi 18x16=488
eh itu 288 yaa-_-
ada a b c nya ga??
itu 20 apa 10 sih yg di sgitiga?-_-
3b' = 105' b = 105' dibagi 3 = 35' jadi b = 35'. 5a' = 105' a = 105' dibagi 5=21'. a+b= 21' + 35' = 56' kah??
3b' = 105' b = 105' dibagi 3 = 35' jadi b = 35'. 5a' = 105' a = 105' dibagi 5=21'. a+bp
2014-06-10T22:47:15+07:00
1. luas =  \frac{a x t}{2} =  \frac{28 x 16} {2} = 224  cm^{2}

2. W = 105
180 - W = 5a
180 - 105 = 5a
75 = 5a
a = 75/5
a = 15

5a = 3b
75 = 3b
b = 75/3
b= 25