8．As shown in the diagram.the triangle PQR has PR=14cm and PQ=10cm． The side RQ produced meets the perpendicular PS at S, so that QS=5cm． The perimeter of triangle PQR is cm． 【查看更多】

 

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As shown in the diagram(如圖)，the triangle PQR has PR=14cm and PQ=10cm. The side RQ produced meets the perpendicular PS at S, so that QS=5cm. The perimeter(周長) of triangle PQR is _____cm．

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As shown in the diagram（如圖），the triangle PQR has PR=14cm and PQ=10cm．The side RQ produced meets the perpendicular PS at S，so that QS=5cm．The perimeter（周長） of triangle PQR is
30
30
cm．
如圖，在△PQR中，PR=14cm，PQ=10cm．過點(diǎn)P作PS⊥RQ交RQ的延長線于點(diǎn)S，QS=5cm，則△PQR的周長為
30
30
cm．

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