1.In Fig. 4.76, BC is a diameter of the circle.
AP perpendicular BC, AP=6cm and AC=10cm.
a)Find the length of PC.
b)Find the radius of the circle.
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2.In Fig. 4.77, AP=PB,APQ=CPQ and PRSQ is a straight line.
a)Show that AR=AS.
b)If ABC=75度 and ACP=45度,find ARS
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