Pada trapesium sama kaki ABCD dengan AB // CD diketahui AB : CD = 5 : 3. Jika BC = 13 cm, tingginya 12 cm dan luasnya 240 cm persegi. Tentukan panjang CD!
argenta
Luas = AB + CD/ 2 x 12 cm = 240 cm^2 = AB + CD x 6 cm = 240cm ^2 = AB + CD = 240 : 6 = AB + CD = 40 cm
= AB + CD/ 2 x 12 cm = 240 cm^2
= AB + CD x 6 cm = 240cm ^2
= AB + CD = 240 : 6
= AB + CD = 40 cm
AB : CD = 5 : 3
x1 5+3 =8
x2 10+6 = 16
x3 15+ 9 = 24
x4 20+12 = 32
x5 25 + 15 = 40
AB = 25
CD = 15