1.A and B are centres of the two circles whose radii are 5 cm and 2 cm respectively.The direct common tangents to the circles meet AB extended at P.Then P divides AB

2.O is the centre of the circle passing through the points A,B and C such that ∠BAO=30°,∠BCO=40° and ∠AOC=x°.What is the value of x ?

3.Two circles interesect each other at P and Q.PA and PB are two diameters.Then ∠AQB is

4.The bisector of A of ABC cuts BC at D and the circumcircle of the triangle at E,Then

5.Two circles with same radius r intersect each other and one passes through the centre of the other.Then the length of the common chord is