In Figure, l is a line intersecting the ...

In Figure, `l` is a line intersecting the two concentric circles, whose common centre is `O ,` at the points `A ,B ,C` and `D` . Show that `A B=C Ddot`

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In Figure,l is a line intersecting the two concentric circles,whose common centre is O, at the points A,B,C and D. Show that AB=CD

If a line intersects two concentric circles (circles with the same centre) with centre O at A, B, C and D, prove that AB = CD (see Fig. 10.25).

The congruent circles with centres Oand O' intersect at two points A and B. Then, angleAOB=angleAO'B .

In figure, two circles intersect each other at points A and E. Their common secant through E intersects the circles at points B and D. The tangents of the circles at points B and D intersect each other at point C. Prove that square ABCD is cyclic.

Given two concetric circles with centre O. A line cut the circle at A,B,C and D respectively. If AB=10cm, then find the length of CD.

In the adjoining figure, O is the centre of two concentric circles. The chord AB of larger circle intersects the smaller circle at C and D. (i) Find AC:BD . (ii) If AC=2cm , then find the length of BD.

A straight line intersects thethree concentric circles at A, B, C. if the distance of line from the centre of the circles is 'P', prove that the area of the triangle formed by tangents to the circle at A, B, C is ((1)/(2P).AB.BC.CA) .

In the figure, two circles with centers O and P intersect each other at points D and C. Line AB intersects the circle with centre O at points A and B and touches the circle with centre P at point E. Prove /_ADE+/_BCE=180^(@) .

Two circle with centres A and B intersect at C and D. Prove that /_ACB=/_ADB

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