
13.2 Akas Teorem Pythagoras
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Mathematics
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7th Grade
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Akmal Hayati
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1
BAB 13 TEOREM PYTHAGORAS
13.2 Akas Teorem Pythagoras
2
Sudut Tegak (90°)
Jika c2 = a2 + b2, maka sudut bertentangan dengan sisi c ialah sudut tegak (90°).
∠ACB = 90°
3
Sudut Tirus (<90°)
Jika c2 < a2 + b2, maka sudut bertentangan dengan sisi c ialah sudut tirus (<90°).
∠ACB = <90° (kurang daripada)
4
Sudut Cakah (>90°)
Jika c2 > a2 + b2, maka sudut bertentangan dengan sisi c ialah sudut cakah (>90°).
∠ACB = >90° (lebih daripada)
5
Contoh 6a (B. Teks m/s 301)
Formula = [ c2 = a2 + b2 ]
c2 = 252 = 625
Jika hasil tambah a2 + b2 bersamaan 625, maka ∠DEF ialah sudut tegak (90°)
a2 (242) + b2 (72) = 625 maka; DEF ialah segitiga bersudut tegak.
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LATIH DIRI 13.2a
Buku Teks m/s 301
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Multiple Choice
a) Tentukan sama ada segitiga berikut bersudut tegak atau bukan.
Ya
Tidak
8
Multiple Choice
b) Tentukan sama ada segitiga berikut bersudut tegak atau bukan.
Ya
Tidak
9
Multiple Choice
c) Tentukan sama ada segitiga berikut bersudut tegak atau bukan.
Ya
Tidak
BAB 13 TEOREM PYTHAGORAS
13.2 Akas Teorem Pythagoras
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