1.diketahui segitiga abc dg panjang sisi-sisinya ab=6cm,bc=7cm,ac=8cm. keliling segitiga itu adalah... a.20cm b.21 cm c.22cm d.23cm

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Mapel : Matematika
Tentang : Bangun Datar
Pertanyaan yg diajukan : 1
Pembahasan :

Diketahui :
- AB = 6 cm
- BC = 7 cm
- AC = 8 cm

Ditanya :
- Keliling

K = AB + BC + AC
K = 6 + 7 + 8
K = 13 + 8
K = 21 cm

Jawaban : B

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Heil Manstein!

6+7+8=21
jawabannya
b.21cm