If PQ be a diamter of a circle with centre at O and if PR= RQ, then the value of `angle RPQ` is

In figure RQ is a tangent to the circle with centre O.If PQ=6cm and QR=4cm then the value of OR is

In the figure given above, PQ is a diameter of the circle whose centre is at O. If angle ROS = 42^(@) , then what is the value of angle RTS ?

PQ is a diameter of a circle with centre O. RS is a chord parallel to PQ that subtends an angle of 40^(@) at the centre of the cirle. If PR and QS are produced to meet at T, Then what will be the measure (in degrees) of /_PTQ ?

PQ is a diameter of the circle with centre at O. The tangent drawn at C on the circle intersects externded PQ at R. If angle CPO =30^(@), then find the value of angle QCR.

PQ is a diameter of the circle with centre at O. The tengent drawn at A on the circle intersect the extended PQ at R. If angle PRA=45^(@), then angle OAP=

The lenghts of the chords PQ and RS of a circle with centre O are equal. If angle ROS be the central angle and angle RQS be the angle in circle, then angleROS = ________

In the adjoining figure 'O' is the centre of the circle and PQ, PR and ST are the three tangents. angleQPR = 50^(@) , then the value of angleSOT is :

In the given figure, O is the centre of the circle and angle QOR= 50^@ , then what is the value of angle RPQ (in degrees)? दी गई आकृति में, O एक वृत्त का केन्द्र है तथा angle QOR= 50^@ है, तो angle RPQ का मान (डिग्री में) क्या है?