Tolongggg please....... Butuh bgt..... Jika luas ABC=80cm² maka panjang BE=.... A.12cm B.14cm C.15cm D.16cm Pakek caranya y.

L = ½ (AC) (AB)
80 = ½ (8)(AB)
AB = 20 cm

[tex]kesebangunan \\ \\ \frac{ac}{ab} = \frac{de}{eb} \\ \\ \frac{8}{20} = \frac{6}{eb} \\ \\ 8(eb) = 120 \\ \\ eb = 15 \: cm[/tex]
Jadi, panjang BE = 15 cm.

L segitiga = ½.a.t
80 = ½.a. 8
80 = a. 4
a =80:4
a = 20
Perbandingan =
8 20
---- = -----
6 x
X = 15
BE= 15

Maaf kalau salah dan tidak tepat