Jawab:
11. Kita cari ∠ACB
∠ACB= 180-71-38
= 71°
maka kita tahu kalau segitiga itu sama kaki, brrti AB=BC
BC=12 cm
keliling = 12+12+8
= 32 cm (C)
12. 11,3cm+8cm+11cm+8cm+11cm
totalnya = 49,3 cm (B)
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Jawab:
11. Kita cari ∠ACB
∠ACB= 180-71-38
= 71°
maka kita tahu kalau segitiga itu sama kaki, brrti AB=BC
BC=12 cm
keliling = 12+12+8
= 32 cm (C)
12. 11,3cm+8cm+11cm+8cm+11cm
totalnya = 49,3 cm (B)