Question

Soal nomor 2 aja. yang jenis bantu ya.

Answer 1

Verified answer

Kelas 8 Matematika
Bab Bangun Ruang

a] BD = AE = 17 cm

b] AB = √(BD² - AD²)
AB = √(17² - 8²)
AB = √(289 - 64)
AB = √(225)
AB = 15 cm

Luas ABD = 1/2 . AB . AD
Luas ABD = 1/2 . 15 . 8
Luas ABD = 60 cm²

c] ** seharusnya terdapat tanda siku-siku **

AC = √(AB² - BC²)
AC = √(15² - 12²)
AC = √(225 - 144)
AC = √(81)
AC = 9 cm

Volume = 1/2 . AC . BC . AD
Volume = 1/2 . 9 . 12 . 8
Volume = 432 cm³