Middle School

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11. Given: TQ bisects ZRTP, QS || PT

RT = 30. Find QP, RS and QS

11 Given TQ bisects ZRTP QS PT RT 30 Find QP RS and QS

Answer :

QP=24 cm

RS=11.25 cm

QS=18.75 cm

Explanation:

Given that TQ bisects

[tex]therefore

consider ΔRQS and ΔRPT

QS||PT,RP and RT are transversals

[tex]

comparing (1) and (2)

[tex]

Therefore SQ=ST(sides opposite to equal angles in an isocelus triangle)

Therefore

therefore by AA criterion for similarity

ΔRQS~ΔRPT

According to the property of similar triangles

[tex]RQ/RP=RS/RT=QS/PT[/tex][tex]9/RP=X/30=QS/50\\9/RP=X/30=(30-X)/50\\X/30=(30-X)/50\\50X=30(30-X)\\50X=900-30X\\50X+30X=900\\80X=900\\X=900/80=11.25\\RS=11.25 cm\\QS=30-X=30-11.25\\QS=18.75 cm\\9/RP=X/30\\9/RP=11.25/30\\9*30/11.25=RP\\RP=24 cm[/tex]

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