In Fig, A, B, C and D are four points on a circle AC and BD intersect at a point E such that `BEC=130^@ and ECD=20^@`. Find BAC.

In given figure, A, B, C and D are four points on a circle. AC and BD intersect at a point E such that angle BEC = 130^(@) and angle ECD = 20^(@) . Find angle BAC.

If A, B, C and D aare four points and vec AB = vec DC then vec AC + vec BD =

In Fig. 12.36 A, B and C are three points on a circle with centre O such that BOC=30^@ and AOB = 60^@ . If D is a point on the circle other than the arc ABC, find ADC.

In the given figure, A, B and C are three points on a circle with centre O such that angle BOC = 30^(@) and angle AOB = 60^(@) . If D is a point on the circle other than the arc ABC, find angle ADC .

If A,B,C are three points on a line and B lies between A and C, then prove that AC-AB = BC

In DeltaABC , D and E are points on AB and AC respectively, such that DE||BC . If (AD)/(DB)=4/13 and AC = 20.4 cm, find AE.

D and E are points on sides AB and AC respectively of Delta ABC such that ar (DBC) = ar EBC). Prove that DE |\| BC.

In Fig A, B and C are points on OP, OQ and OR respectively such that AB || PQ and AC || PR . Show that BC || QR.

In the given figure, AD is a diameter of a circle with centre O and AB is a tangent at A. C is a point on the circle such that DC produced intersects the tangent at B and |__ABD=50^(@) . Find |__COA .

In Delta ABC, D and E are points on side AB and AC respectively such that DE || BC and AD : DB = 3 , If EA = 3.3 cm , them find AC.