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Jari jari = 5 cm
Panjang garis singgung = √(13² -5²)= 12
5)
Luas layang layang = 1200
1/2 (OA)(BC) = 1200
1/2 (OA)(48) = 1.200
OA = 1.200/24
OA = 50
AB² = OA² - OB²
AB² = 50² - 30²
AB = 40