tolong pakai cara nomor 3,4 dan 5

3. a. Sudut ABO = Sudut BAO = 35°
b. Sudut AOB = 180° - 35° - 35° = 110°
c. Sudut DAO = 90° - 35° = 55°
d. Sudut ADO = Sudut DAO = 55°
4. a. K = 2(p+l) L = p . l
= 2(8+12) = 8 . 12
= 2 . 20 = 96 cm²
= 40 cm
b. K = 2(p+l) L = p . l
= 2(14+23) = 14 . 23
= 2 . 37 = 322 cm²
= 74 cm
5. p = 3x-3
l = 8
L = p . l
120 = (3x-3) . 8
120 = 24x - 24
120 + 24 = 24x
144 = 24x
144/24 = x
6 = x (nilai x)
Ukuran panjang = 3x-3
= 3 . 6 - 3
= 18 - 3
= 15 cm
K = 2(p+l)
= 2(15+8)
= 2 . 23
= 46 cm
Semoga membantu :)