Luas permukaan …

Luas permukaan …

Luas permukaan ...

Jawaban yang benar adalah 120 cm²

Luas permukaan prisma segitiga adalah
Lp = (2 x La) + (Ka x tp)
= (2 x ½ x a x t) + (Ka x tp)

Dengan,
Lp = luas permukaan prisma segitiga
La = luas alas
Ka = keliling alas
tp = tinggi prisma
a = alas segitiga
t = tinggi segitiga

Keliling segitiga
= jumlah seluruh sisi
= 3 + 4 + 5
= 12 cm

Luas permukaan
= (2 x ½ x 3 x 4) + (12 x 9)
= 12 + 108
= 120 cm²

Jadi luas permukaan = 120 cm²

Rekomendasi lainnya :

Baca Juga :  Miss Silvia works at Graha Hospital. She looks after sick children at night. She starts to work at 10 p.m. and finishes at 7 o'clock in the morning. She goes to work by a motorcycle. She has twenty children in her section. She stays up all night. She looks at the children many times during the night. She sometimes sits and talks to a child. The children sleep most of the time. She usually wakes up them at 5 a.m. and gives them breakfast at 6 a.m. After that, she goes home at 7 a.m. Although she feels very tired, she loves her job
IlmuanTekno
© Copyright 2025, All Rights Reserved