ABCD is a parallelogram DE `_|_`AB, `DF_|_BC`. Find DF.

ABCD is a parallelogram and angleA = 60^(@) . Find the remaining angles.

ABCD is a cyclic parallelogram and AC = 9 cm, find BD.

ABCD is a parallelogram. AE is perpendicular on DC and cF is perpendicular on AD. If AB = 10 cm, AE = 8 cm and CF = 12 cm. Find AD

ABCD is a parallelogram then /_A-/_C = ……………degrees.

In the adjacent figure DeltaABC, D is the midpoint of BC. DE_|_AB, DF_|_AC and DE = DF . Show that DeltaBED ~= Delta CFD .

In the given figure, ABED is a parallelogram in which AB = DE = 10 cm and the area of Delta BED is 72 cm^(2) . If CE = 16cm, find the area of the trapezium ABCD.

ABCD is parallelogram and ABEF is a rectangle and DG is perpendicular on AB. Prove that (i) ar (ABCD) = ar(ABEF) (ii) ar (ABCD) = AB xx DG

ABCD is parallelogram and ABEF is a rectangle and DG is perpendicular on AB. Prove that ar (ABCD)= ABxxDG

In Delta^(s)ABC and, AB"||"DE, BC=EF and BC"||"EF . Vertices A, B and C are joined to vertices D, E and F respectively (see figure). Show that (i) ABED is a parallelogram (ii) BCFE is a parallelogram (iii) AC = DF (iv) DeltaABC~=DeltaDEF