Area of special quadrilaterals

Area of the quadrilaterals formed by joining the mid points of the adjacent sides of a quadrilateral is________ the area of given quadrilateral.

Two radii of a circle are inclined at 130^(@) . Tangents are drawn at the end points of the diameters formed from the radii to form a quadrilateral.Explain the special quadrilateral formed.

Two radius of a circle are inclined at 130^(@). Tangents are drawn at the anti points of the tangents formed from the radii to from a quadrilateral.Expain the special quadrilateral formed.

Area of the quadrilateral formed by the lines |x|+|y|=2is

ABCD is a convex quadrilateral.Join the corresponding trisection points of pairs of opposite sides.Prove that the area of the central quadrilateral,so formed,is (1)/(9) area (BCD)

ABCD is a quadrilateral and let AB=vec a ,AD=vec b,AC=mvec a+nvec b then the area of the quadrilateral is

Let ABCD be a quadrilateral in which AB is parallel to CD and perpendicular to AD,AB =3 3CDand the area of the quadrilateral is 4 square units.If a circle can be drawn touching all the sides of the quadrilateral,then its radius is:

The diagonal of a quadrilateral is 20 cm in length and the lengths of perpendiculars on it from the opposite vertices are 8.5 cm and 11.5 cm. The area of the quadrilateral is

Find the area of the Quadrilateral

Find the area of given quadrilateral."