Two circles intersect at two points P and S. QR is a tangent to the two circles at Q and R. If `angleQSR= 72^@`, then `angleQPR =`.

Two circles intersect at two points P and S.QR is a tangent to the two circles at Q and R. If /_QSR=72^(@), then /_QPR=.

Two circles intersect each other at points A and B. A straight line PAQ cuts the circles at P and Q. If the tangents at P and Q intersect at point T, show that the points P, B, Q and T are concylic.

In the figure, two circles intersect each other in points P and Q. If tangent from point R touch the circles at S and T, then prove that RS=RT.

In the figure, two circles intersect each other in points P and Q. If tangent from point R touch the circles at S and T, then prove that RS=RT.

Two circles intersect each other at point P an Q. If PA and PB are two diameter then find angleAQB .

In the adjoining figure, two circles intersect each other in point R and point S. Line PQ is a common tangent touching circle at points P and Q. Prove that /_PRQ+/_PSQ=180^@

Two circles with centres O and O' of radii 3cm and 4 cm, respectively intersect at two points P and Q, such that OP and O' P are tangents to the two circles. Find the length of the common chord PQ.

Two circles with centres O and O' of radii 3 cm and 4 cm , respectively intersect at two points P and Q such that OP and O'P are tangents to the two circle . Find the length of the common chord PQ.