

DIMENSI TIGA
Presentation
•
Mathematics
•
12th Grade
•
Hard
Ziyadatul Hasanah
Used 1+ times
FREE Resource
6 Slides • 0 Questions
1
DIMENSI TIGA
JARAK TITIK KE GARIS

2
Jarak Titik ke Garis
Ilustrasi di samping menunjukan jarak titik A ke garis g adalah panjang ruas garis yang ditarik dari titik A dan tegak lurus garis g
3
Contoh 1:
Perhatikan gambar berikut!
Diketahui kubus ABCD.EFGH dengan panjang
rusuk 5 cm. Tentukan:
a. Jarak titik A ke rusuk HG
b. Jarak titik B ke diagonal AG
4
Penyelesaian:
a. Perhatikan gambar berikut!
Jarak titik A ke rusuk HG adalah panjang ruas garis AH, (AH tegak lurus HG).
AH = 5√2 (AH diagonal sisi)
Jadi jarak A ke HG = 5√2 cm
5
b. Perhatikan gambar berikut!
Jarak titik B ke garis AG = jarak Titik B ke P (BP tegak lurus AG).
Perhatikan segitiga ABG. Dengan panjang AB = 6 cm, BG = 6√2 cm (diagonal bidang), dan AG = 6 √3cm (diagonal ruang).
Panjang BP kita cari menggunakan rumus luas segitiga.
6
DIMENSI TIGA
JARAK TITIK KE GARIS

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