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2.) QR² = 3²+4²
QR² = 9 + 16
QR² = 25
QR = √25
QR = 5 jawaban a
3.) tang 30 = km/kl
1/3√3 = 6/kl
6 : 1/3√3= kl
18√3 = km
4.) cos 45 = PR/QR
1/2 √3 = PR/12
12 : 1/2√3 = PR
12 X 2/√3= PR
18√3 = PR
5.) jawaban A terbukti
5² = 13² - 12²
5² = 169 -144
5² = √25
5 = 5
Rumus pythagoras :
b² = a² + c²
2).
c = √ ( a² + b² )
c = √ ( 4² + 3² )
c = √25
c = 5 cm
3).
KM : KL = 1 : √3
6 : KL = 1 : √3
KL = 6√3 cm
4).
PQ : PR = 1 : √2
12 : PR = 1 : √2
PR = 12√2 cm
5).
12, 5, 13