ABCD is a rectangle AC is diagonal. Find the nature of `DeltaACD`. Give reasons.

In a rectangle the diagonals are ………

ABCD is a rectangle. bar(AC) and bar(BD) are diagonals. Write the pairs of parallel lines, perpendicular lines and intersecting lines from the figure in symbolic form. Pair of intersecting lines

BASE is a rectangle. Its diagonals intersect at O. Then Find the value of x , if OB=5x+1 and OE=2x+4 .

Find the measure of angle 'a' in each case. Give reason:

Find the measure of angle 'a' in each case. Give reason:

Find the measure of angle 'a' in each case. Give reason:

Diagonal of rectangle is ………. units.

Find the measure of angle 'a' in each case. Give reason :

In the figure, ABCD is a quadrilateral. AC is the diagonal and DE || AC and also DE meets BC produced at E. Show that ar(ABCD) = ar (DeltaABE).

One of the diagonals of the quadrilateral ABCD is