Pada trapesium PITA , PI // AT , PI = 3a cm , AT=2a cm , dan luas PITA = 100 CM kuadrat. berapa panjang PI dan AT jika tinggi trapesium tersebut 8 cm??
Hazato
L = ( a + b ) : 2 x t 100 = ( 3a + 2a ) : 2 x 8 100 = 5a x 4 100/4 = 5a 25 = 5a 25/5 = a 5 =a
100 = ( 3a + 2a ) : 2 x 8
100 = 5a x 4
100/4 = 5a
25 = 5a
25/5 = a
5 =a
PI = 3a = 3(5) = 15
AT = 2a = 2(5) = 10
maaf kalo salah
8a+12a =100
20a =100
a =5
PT=3a
PT=5.3=15
AT=2a
AT=5.2=10