maaf nggak jelas soalnya lagi males nulis tolong jawab solanya itu buat ulangan besok

1.
[tex] {ac}^{2} = {ab}^{2} + {bc}^{2} \\ ac = \sqrt{ {ab}^{2} + {bc}^{2} } \\ ac = \sqrt{ {8}^{2} + {6}^{2} } \\ ac = \sqrt{64 + 36} \\ ac = \sqrt{100} \\ ac = 10 \: cm[/tex]
2.
[tex] {pq}^{2} = {pr}^{2} - {qr}^{2} \\ pq = \sqrt{ {pr}^{2} - {qr}^{2} } \\ pq = \sqrt{ {10}^{2} - {6}^{2} } \\ pq = \sqrt{100 - 36} \\ pq = \sqrt{64} \\ pq = 8 \: cm[/tex]
3.
[tex]s = \sqrt{ {12}^{2} + {9}^{2} } \\ s = \sqrt{144 + 81} \\ s = \sqrt{225} \\ s = 15 \: cm[/tex]
4. Saya tak tahu
5.
[tex]l = \frac{1}{2} \times 5 \times 12 \\ = 5 \times 6 \\ = 30 \: {cm}^{2} [/tex]
6.
[tex]k \: = 2 \times \pi \times r \\ = 2 \times 3.14 \times 10 \\ = 20 \times 3.14 \\ = 62.8 \: cm[/tex]
7.
[tex]l = \frac{1}{4} \times \pi \times {d}^{2} \\ = \frac{1}{4} \times \frac{22}{7} \times 14 \times 14 \\ = \frac{1}{4} \times 22 \times 2 \times 14 \\ = \frac{1}{4} \times 44 \times 14 \\ = 11 \times 14 \\ = 154 \: {cm}^{2} [/tex]
8.
[tex]sudut \: pusat \: = 2 \times sudut \: keliling \\ = 2 \times {40}^{o} \\ = {80}^{o} [/tex]