Question

PA is a tangent to a circle with centre 'O' and radius 5 cm . AD is a chord of length 6cm intersecting OP at C . Find the length of PA . pls ans...

Answer 1

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In triangle AOP,

(AO)² = (AP)² + (OP)²

⇒ (AO)² = (3)² + (4)² = 9 + 16 = 25

⇒ AO = 5 cm = radius

∴ Area of the circle = πr² = 22/7 × 5 × 5 = 550/7 = 78.5 cm²