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In the figure, BC=10 cm, AD=6 cm < PQB =...

In the figure, BC=10 cm, AD=6 cm < PQB = < ABD, < PRC = < ACD, AP = 3 cm, then
a) What is the area of triangle ABC?
b) What is the ratio A D: P D ?
c) Calculate the area of triangle PQR.

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