Geometry & Trigonometry — ICSE Class 10

Question 1 • 2022 4 Marks

In a circle with centre O , chords AB and CD intersect externally at point P . If PA = 12\text{ cm} , AB = 4\text{ cm} , and PD = 6\text{ cm} , find the length of chord CD . Also prove that \Delta PAC \sim \Delta PDB .

Answer: CD = 10 \text{ cm}