If the central angle of two complementary arcs are equal then the measure of each is

In figure, a circle inscribed in a Δ ABC,touching AB, BC and AC at P, Q, R respectively, If AB = 10 cm, AR = 7 cm and RC = 5cm then, the length of BC is

Given two concentric circles of radii a and b ( a>b) find the length of a chord of large circle which touches the other.

In the figure ,AB isa diameter of a circle and PT is a tangent to the circle. If PB = 2 cm, PT = 8 cm, then the radius of the circle is

PQRS is a cyclic quadrilateral ∠P : ∠R = 3 : 2
∠Q:∠S = 4:1 then ∠S =

Which one of the following may be the central angle of a minor arc

Determine the length of a tangent to circle with radius 5 cm, drawn from a point at a distance of 13cm, from the centre of the circle.

In ΔPQR ,ST || QR and ^PS/_SQ = ³/₅  If PR = 6 cm
then PT =

Two circles touch externally at a point P from a point T on a common tangent PT , tangent segment TA and TB are drawn to the two circles .then TA =

In figure ∠BDC = 35⁰ .Which angle is equal to ∠BDC?