Jawabanmu

2014-06-10T08:28:21+07:00
BD = CB / 2 = 8 / 2 = 4

AD^ = AB^ - BD ^
        =  5^ - 4^
        = 25 - 16
AD^   = 9
AD = 3
2014-06-10T08:31:24+07:00
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L= V s(s-a)(s-b)(s-c) s= 1/2(5+8+7)= 10
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= V 10(10-5)(10-8)(10-7)
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= V 10.5.2.3
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= V300
=10V 3
L = 1/2 a.t
10V3 = 1/2.8.t
t= 20V3/8= 2,5V8
10nya dari mana ya? kurang ngerti
s= 1/2 keliling pelajari d rumus
kak itu segitiga kan? bangun datar?