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MATEMATIK TINGKATAN 1 THEOREM PHYTAGORAS
13.1 Teorem Pythagoras
 Sisi yang terpanjang dalam
sebuah segi tiga bersudut tegak
ialah sisi yang sentiasa
bertentangan dengan sudut
tegak
 Sisi tersebut disebut sebagai
hipotenus segi tiga bersudut
tegak.
Menentukan panjang sisi yang
tidak diketahui bagi suatu segi
tiga bersudut tegak.
Teorem Pythagoras boleh digunakan untuk
menentukan panjang sisi yang tidak diketahui
dalam suatu segi tiga bersudut tegak jika
panjang dua sisi yang lain diberi.
Rumus Theorem Phytagoras
Untuk mencari panjang sisi a
Untuk mencari panjang sisi b
Untuk mencari panjang sisi a
Contoh 1
Bagi setiap yang berikut, hitung nilai x.
Contoh 2
Sudut
tegak
𝑎2
+ 𝑏2
= 𝑐2
𝑎 = √𝑐2 − 𝑏2
𝑏 = √𝑐2 − 𝑎2
𝑐 = √𝑎2 + 𝑏2
a
b
c Tips!!
Tetapkan sisi yang
bertentangan
dengan sudut
tegak (hipotenus)
sebagai c untuk
memudahkan
pengiraan
menggunakan
rumus theorem
phytagoras
c
b
a
𝑐 = √𝑎2 + 𝑏2
𝑥 = √122 + 162
= √144 + 256
= √400
𝑥 = 20𝑐𝑚
𝑎 = √𝑐2 − 𝑏2
𝑥 = √262 − 242
= √676 − 576
= √100
𝑥 = 10𝑐𝑚
Hitung panjang PQ dalam setiap rajah yang
berikut.
Cari panjang RP. RP = 5
c
b
a
𝑐 = √𝑎2 + 𝑏2 = √25 + 144
𝑥 = √52 + 122 = √169 𝑥 = 13𝑐𝑚
MATEMATIK TINGKATAN 1 THEOREM PHYTAGORAS
13.2 Akas Teorem Pythagoras
Menentukan suatu segi tiga adalah
segi tiga bersudut tegak?
Contoh 3
Tentukan sama ada setiap segi tiga
yang berikut ialah segi tiga
bersudut tegak atau bukan.
Penyelesaian Masalah
Dalam rajah di bawah, hitung nilai x.
Akas teorem Pythagoras
menyatakan bahawa:
Jika 𝑐2
= 𝑎2
+ 𝑏2
, maka
sudut bertentangan dengan
sisi c ialah sudut tegak.

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Nota math f1 bab 13 theorem phytagoras

  • 1. MATEMATIK TINGKATAN 1 THEOREM PHYTAGORAS 13.1 Teorem Pythagoras  Sisi yang terpanjang dalam sebuah segi tiga bersudut tegak ialah sisi yang sentiasa bertentangan dengan sudut tegak  Sisi tersebut disebut sebagai hipotenus segi tiga bersudut tegak. Menentukan panjang sisi yang tidak diketahui bagi suatu segi tiga bersudut tegak. Teorem Pythagoras boleh digunakan untuk menentukan panjang sisi yang tidak diketahui dalam suatu segi tiga bersudut tegak jika panjang dua sisi yang lain diberi. Rumus Theorem Phytagoras Untuk mencari panjang sisi a Untuk mencari panjang sisi b Untuk mencari panjang sisi a Contoh 1 Bagi setiap yang berikut, hitung nilai x. Contoh 2 Sudut tegak 𝑎2 + 𝑏2 = 𝑐2 𝑎 = √𝑐2 − 𝑏2 𝑏 = √𝑐2 − 𝑎2 𝑐 = √𝑎2 + 𝑏2 a b c Tips!! Tetapkan sisi yang bertentangan dengan sudut tegak (hipotenus) sebagai c untuk memudahkan pengiraan menggunakan rumus theorem phytagoras c b a 𝑐 = √𝑎2 + 𝑏2 𝑥 = √122 + 162 = √144 + 256 = √400 𝑥 = 20𝑐𝑚 𝑎 = √𝑐2 − 𝑏2 𝑥 = √262 − 242 = √676 − 576 = √100 𝑥 = 10𝑐𝑚 Hitung panjang PQ dalam setiap rajah yang berikut. Cari panjang RP. RP = 5 c b a 𝑐 = √𝑎2 + 𝑏2 = √25 + 144 𝑥 = √52 + 122 = √169 𝑥 = 13𝑐𝑚
  • 2. MATEMATIK TINGKATAN 1 THEOREM PHYTAGORAS 13.2 Akas Teorem Pythagoras Menentukan suatu segi tiga adalah segi tiga bersudut tegak? Contoh 3 Tentukan sama ada setiap segi tiga yang berikut ialah segi tiga bersudut tegak atau bukan. Penyelesaian Masalah Dalam rajah di bawah, hitung nilai x. Akas teorem Pythagoras menyatakan bahawa: Jika 𝑐2 = 𝑎2 + 𝑏2 , maka sudut bertentangan dengan sisi c ialah sudut tegak.