Find the coordinates of points *P, Q, R* and *S* in Fig. 27.8.

Draw perpendiculars PE, QH, RI and SK from P, Q, C,R and S on the *x*-axis. Also, draw perpendiculars PF, QG, RJ and SL on the *y*-axis.

From the figure, we have:

PF = 10 cm and PE= 70 cm

So, the coordinates of vertex P are (10, 70).

Similarly, QG=12 cm and QH= 80 cm

So, the coordinates of vertex Q are (12, 80).

RJ = 16 cm and RI= 100 cm

So, the coordinates of vertex R are (4, 6).

SL = 20 cm and SK= 120 cm

So, the coordinates of vertex S are (5, 3).

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