Two parallel lines touch the circle at points P & Q respectively. If area of circle is `49 pi cm^(2)` ,then find PQ?

Two circles with radius 4 cm and 9 cm respectively touch each other externally. Their common tangent touches the circles at point P and Point Q respectively. Then, area of the square with side PQ is.

The area of a circle is 49pi cm^2 .Its circumference is

Two two circle with their centre at P and Q intersect each other, at the point A and B . Through the point A , a straight line parallel to PQ intersects the two circles at the points C and D respectively . If PQ = 5 cm , then determine the lenght of CD .

Two circles of radii 4 cm and 9 cm respectively touch each other externally at a point and a common tangent touches them at the points P and Q respectively. Then the area of a square with one side PQ, is

Two chords AB and AC of the larger of two concentrci circles touch the other circle at points P and Q respectively. Prove that PQ = 1/2BC .

Two circles of radii 4 cm and 9 cm respectively touch each other externally at a point and a common tangent touches them at a point P and Q respectively Then, area of square with one side PQ is

A and B are the centers of two circles with radii 11 cm and 6 cm respectively. A common tangent touches these circles at P and Q respectively. If AB = 13 cm, then the length of PQ is:

From a point P which is at a distance of 10 cm from the centre O of a circle of radius 6 cm, a pair of tangents PQ and PR to the circle at point Q and P respectively, are drawn. Then the area of the quadrilateral PQOR is equal to

Two circles with centres O_(1) and O_(2) touch each other externally at a point R. AB is a tangent to both the circles passing through R. P'Q' is an-other tangent to the circles touching them at P and Q respectively and also cutting AB at S. PQ measures 6 cm and the point S is at distance of 5 cms and 4 cms from the centres of the circles. What is the area of triangle SO_(1)O_(2) ?

Two circles touch each other externally at a point P and a direct common tangent touches the circles at the points Q and R respectively. Then angle QPR is