Tolong dijawab ya soal no 6 dan 7 jangan lupa pake cara :)

6. t = √5²-4² = 25-16 = √9 = 3
½ × a × t = ½ × 12 × 3 = 18cm²

7. 12/16 = x/16,25
16x = 195
x = 195/16 = 12,1875
maaf kalau salah ya