Same chapter4 marksDifficulty: Hard
In a circle with centre O, chord AB is produced to a point P outside the circle, and PT is a tangent from P touching the circle at T. If PA = 5 cm and AB = 7 cm, find the length of PT.
Circles
4 marksDifficulty: Hard
In a circle with centre O, AB is a diameter and C is a point on the circle. If angle CAB = 35°, find angle ACB and angle ABC.
Original Khojo Papers practice question — not from a past board paper.
Answer
Angle ACB = 90° and angle ABC = 55°.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
AB is a diameter, so the angle in the semicircle at C is 90°. The angles of triangle ABC add to 180°, so angle ABC = 180° − 90° − 35° = 55°.
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