Jawab: 12√5 cm²
Penjelasan dengan langkah-langkah:
s = seteengah keliling
s = 1/2 (7+8+9)
s = 0,5(24)
s = 12
L = √s(s-a)(s-b)(s-c)
L = √12(12-7)(12-8)(12-9)
L = √12(5)(4)(3)
L = 12√5 cm²
Jadi luas segitiga ABC 12√5 cm²
======================================
Mapel : MATEMATIKA
Kelas : smp
Kategori : Bangun datar
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Jawab: 12√5 cm²
Penjelasan dengan langkah-langkah:
s = seteengah keliling
s = 1/2 (7+8+9)
s = 0,5(24)
s = 12
L = √s(s-a)(s-b)(s-c)
L = √12(12-7)(12-8)(12-9)
L = √12(5)(4)(3)
L = 12√5 cm²
Jadi luas segitiga ABC 12√5 cm²
======================================
Mapel : MATEMATIKA
Kelas : smp
Kategori : Bangun datar