To draw tangents to a circle with centre O from an external point P, an auxiliary circle is drawn whose diameter is
A. the radius of the given circle
B. twice OP
C. half of OP
D. seg OP
1 answer
Best answer
Answer: D. seg OP
We find the midpoint M of OP and draw a circle with centre M and radius MO. This circle has OP as a diameter, and it cuts the given circle at the points of contact.
Doubtly AI
· 24 Oct 2026
AI-verified · Oct 2026
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