
D.Kesebangunan pada segitiga
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Mathematics
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9th Grade
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Hard
Kartini Subekti
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D.Kesebangunan pada segitiga
By Kartini Subekti
1.Syarat dua segitiga sebangun ;
Perbandingan sisi yang bersesuaian sama ( senilai ) atau sudut - sudut yang bersesuaian sama besar
2
Perhatikan gambar berikut.
Segitiga PQR dengan TU sejajar QR dapat ditulis TU // QR
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4
5
Contoh soal 1
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2.Garis - garis sejajar pada segitiga
Perhatikan gambar berikut.
9
Contoh soal 3
Perhatikan gambar berikut
a.Hitung panjang SP
b.Jika ST = 5 cm hitung panjang PQ
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3.Rumus - rumus pada segitiga siku - siku
Perhatikan gambar berikut.
Segitiga ABC siku - siku di B dan dibuat garis tinggi ke sisi miring.
BD = garis tinggi ke sisi miring
AC = sisi miring , maka berlaku rumus seperti berikut.
BD 2 = DC x DA BA 2= AD x AC BC 2 = CD x CA
D.Kesebangunan pada segitiga
By Kartini Subekti
1.Syarat dua segitiga sebangun ;
Perbandingan sisi yang bersesuaian sama ( senilai ) atau sudut - sudut yang bersesuaian sama besar
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