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ചിത്രത്തിൽ, BC എന്നത് ഒരു കോർഡും PA എന്നത് വൃത്തത്തിലേക്കുള്ള ഒരു ടാൻജെന്റുമാണ്. PB=4cm, PA=6 cm, BC എന്ന കോർഡിൻ്റെ നീളം ഇതാണ്:

image.png

A6 centimetres

B8 centimetres

C5 centimetres

D10 centimetres

Answer:

C. 5 centimetres

Read Explanation:

Using the tangent-secant theorem:

PA2=PB×PCPA^2 = PB \times PC

Given:

PA=6cm

PB=4

62=4×PC6^2=4\times PC

36=4PC36=4PC

PC=9cmPC=9cm

Since

PC=PB+BC:

BC=9−4=5 cmBC=9-4=\boxed{5\text{ cm}}

Answer: 5 cm


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