Chords AB and CD of a circle intersect externally at P. If CD = 11.6 cm, PD = 6.4 cm and PB = 7.2 cm, then AB (in cm) is equal to:

The radii of two concentric circles are 17 cm and 25 cm. a straight line PQRS intersects the larger circle at the points P and S and intersects the smaller circle at the points Q and R. If QR = 16 cm, then the length (in cm.) of PS is 

For what value of 'm ' the points A ( m + 1 , 1 ) , B ( 2m + 1,3 ) and C ( 2m + 2 , 2m ) are collinear . 

What will be the area of thé trapezium formed by x - axis , y - axis , and lines 3x + 12 , 6x + 8y = 60 ? 

The graphs of the equations 3x + y-5=0 and 2x- y -5=0 intersect at the point P(α,β).  What is the value of (3α + β)?

The graph of the equation 4x - 5y = 20 intersects the X-axis at the point.

If a line has one end (4,0) and the middle point (4,1), what will be the directions at the other end of the line?

Find the coordinates of the midpoint of the line joining the points (10,12) and (0,8).