XY and XZ are tangents to a circle, ST is another tangent to the circl – McqOptions

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1.	XY and XZ are tangents to a circle, ST is another tangent to the circle at the point R on the circle, which intersects XY and XZ at S and T respectively. If XY=15 cm and TX= 9 cm then RT is:
A.	3 cm
B.	7.5 cm
C.	6 cm
D.	4.5 cm
Answer» D. 4.5 cm

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