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In the figure, the horizontal Iines are....

In the figure, the horizontal Iines are. paraliel. The distance between them are3 centimetres, 4 centimetres, 5 centimetres respectively. If Q R=8 centimetres then
a) Find the ratio P Q: Q R: RS
b)if RS=RT,PQ=QT,calculate perimeter of triangle QRT.

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