In the given figure QR is a common tangent of the given circle touching at T meets QR at P . If PT = 3.8cm then find the length of QR(in cm)
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Answered by
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Answer:
7.6 cm
Step-by-step explanation:
Lengths of the tangents drawn from an external point to a circle are equal.
∴QP = PT = 3.8cm ....(i)
PR = PT = 3.8cm ....(ii)
From equations (i) and (ii):
QP = PR = 3.8cm
But, QR = QP + PR
∴ QR = 3.8 + 3.8
QR = 7.6 cm
Answered by
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꧁༺༒ANSWER༒༻꧂
Lengths of the tangents drawn from an external point to a circle are equal.
∴Q P=P T=3.8cm.(i)
P R=P T=3.8cm.(i i)
From equations ( i ) and ( i i ):
QP=PR=3.8cm
But, QR=QP+PR
∴QR=3.8+3.8
QR=7.6cm
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