tolong dibantu ya Kak nomor 8 sampai 10 pakai cara

[tex]8. \frac{1}{2} (ps + sq)(8) = 84 \\ ps + sq = \frac{84 \times 2}{8} = 21 \\ ps + \frac{5}{2} ps = \frac{7}{2} ps = 21 \\ ps = 6[/tex]
[tex]ab = \sqrt{ {25}^{2} - {7}^{2} } = \sqrt{576} = 24 \\ karena \: cd \: garis \: berat \: maka \: ad = bd \\ \frac{1}{2} \times 12 \times 7 = 42[/tex]