. 15°
12.Which of the following is (are) true?
1. A diameter of a circle is also a chord of the circle.
2. The largest chord of a circle is a diameter.
3. In a circle of radius 10 cm , no chord has length 15 cm.
A. 1 only B. 2 only C. 3 only D. 1 and 2 only E. 2 and 3 only
13.In the figure , O is the centre of the circle and AOD is a diamerer.
If ∠CBD=38° , then ∠ADC=………
A. 62° B. 42° C. 32°
D. 22° E. 52°
14.In circle O , AC is a diameter , PA is a tangent at A, and PBC is a secant meeting the circle
at B and C . If the radius of the circle is 2 cm and ∠APB = 30°, then the length of the tangent
PA , in cm is
A. 6 B. 43 C. 48 D. 8 E. 22
