
SUDUT BERTOLAK BELAKANGG
Presentation
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
Andraini Siddiqoh
Used 7+ times
FREE Resource
7 Slides • 0 Questions
1
SUDUT BERTOLAK BELAKANG
TUJUAN PEMBELAJARAN:
Setelah Belajar, siswa diharapkan dapat:
1. Menganalisis Sudut Bertolak belakang
2. Menghitung besar sudut yang bertolak belakang.
2
Perhatikan gambar di samping!
∠A1 berpelurus dengan ∠A2 dan ∠A4
∠A3 bertolak belakang dengan ∠A1
∠A2 bertolak belakang dengan ∠A4
Sehingga ∠A1 = ∠A3 dan ∠A2 = ∠A4
SUDUT BERTOLAK BELAKANG
3
Jika ∠A1 = 112o, maka tentukan besar :
a. ∠A2
b. ∠A3
c. ∠A4
Contoh soal:
Perhatikan gambar di bawaah ini!
4
Jawaban:
b. ∠A3 berpelurus dengan ∠A2, maka ∠A3 = 180o - ∠A2 = 180o - 68o = 112o
a. ∠A2 berpelurus dengan ∠A1, maka ∠A2 = 180o - ∠A1 = 180o - 112o = 68o
c. ∠A4 berpelurus dengan ∠A1, maka ∠A4 = 180o - ∠A1 = 180o - 112o = 68o
5
Bagaimana besar sudut atas dengan bawah ?
Bagaimana pula besar sudut kiri dengan kanan?
Sekarang perhatikan besar ke empat dudut tadi!
6
Kesimpulan:
Pada sudut bertolak belakang berlaku:
Jumlah sudut berpelurus 180o
Sudut yang bertolak belakang sama besar
7
Tentukan besar :
a. ∠COB
b. nilai x
c. ∠AOD
Latihan soal:
Perhatikan gambar di bawah ini!
SUDUT BERTOLAK BELAKANG
TUJUAN PEMBELAJARAN:
Setelah Belajar, siswa diharapkan dapat:
1. Menganalisis Sudut Bertolak belakang
2. Menghitung besar sudut yang bertolak belakang.
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