Circles (1)
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32. In Figure, APC,AQB and BRC are three semicircles. PB⊥AC. AQP and CRP are stright lines. AB = 8cm and BC = 18 cm.
(a) Show that PQBR is a rectangle.
(b) Show that QR is a common tangent to the two smaller semicircles.
(c) Find the length of QR.
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