tolong bantu nomor 69 sama caranya ya kak makasihh

[tex]ad {}^{2} = \: ac {}^{2} \: - \: cd {}^{2} \\ ad {}^{2} \: = 8.5 {}^{2} \: - \: 4 {}^{2} \\ ad {}^{2} = \: 72.25 \: - \: 16 \\ ad {}^{2} \: = 56.25 \\ ad \ = \: \sqrt{56.25} \\ ad \: = 7.5 \: m[/tex]

[tex]bd {}^{2} \: = \: bc {}^{2} \: - \: cd {}^{2} \\ bd {}^{2} = \: 5 {}^{2} \: - \: 4 {}^{2} \\ bd {}^{2} \: = \: 25 \: - \: 16 \\ bd {}^{2} \: = \: 9 \\ bd \: = \: \sqrt{9} \\ bd \: = \: 3 \: m[/tex]

[tex]lebar \: tenda \: dari \: a \: ke \: b \\ adalah........ \\ = ad \: + \: bd \\ = 7.5 \: + \: 3 \\ = 10.5 \: m[/tex]

SEMOGA MEMBANTU :)