In the figure, PQ is parallel to RS. The length of RP is 6 cm; the length of PT is 18 cm; the length of QT is 21 cm. What is the length of SQ ?
http://media.apexlearning.com/Images/201306/25/66e71d68-fcc2-4c5e-98c3-4cefeb92af64.jpg
A. 63 cm
B. 7 cm
C. 12 cm
D. 3 cm

Question

In the figure, PQ  is parallel to RS. The length of RP  is 6 cm; the length of PT is 18 cm; the length of QT  is 21 cm. What is the length of SQ ?
http://media.apexlearning.com/Images/201306/25/66e71d68-fcc2-4c5e-98c3-4cefeb92af64.jpg
A.	63 cm
B.	7 cm
C.	12 cm
D.	3 cm

jiteshmeghwal9 · Answer

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jiteshmeghwal9 · Answer

By basic proportionality theorem$$\frac{pt}{pr}=\frac{qt}{qs}$$$$\frac{18}{6}=\frac{21}{qs}$$find $$qs.$$