Tolong bantu saya..............
No. 4
- Nilai x
AB + BC + AC = K
2x - 3 + x + 8 + 3x = 59 cm
6x + 5 = 59 cm
6x = 59 - 5 cm
6x = 54 cm
x = 9 cm
- Ukuran
AB = 2(9) - 3 = 18 - 3 = 15 cm
BC = 9 + 8 = 17 cm
AC = 3(9) = 27 cm
Opsi A.
No. 5
- tinggi
[tex] \tt = \sqrt{ {5}^{2} - {(16 - 12)}^{2} } [/tex]
[tex] \tt = \sqrt{25 - {4}^{2} } [/tex]
[tex] \tt = \sqrt{25 - 16} [/tex]
[tex] \tt = \sqrt{9} [/tex]
= 3 cm
- Luas
[tex] \tt = \frac{(a \: + \: b) \: \times \: t}{2} [/tex]
[tex] \tt = \frac{(12 \: + \: 16) \: \times \: 3}{2} [/tex]
[tex] \tt = \frac{28 \: \times \: 3}{2} [/tex]
[tex] \tt = \frac{84}{2} [/tex]
= 42 cm² (C.)
[tex] \pink{\boxed{\red{\boxed{\purple{\mathfrak{\ast ~ \blue{Celia ~ Claire} ~ \ast}}}}}}[/tex]
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