Given that ABCD is a parallelogram and `B=80^@` . What can you conclude about the other angles of the parallelogram ?

Given that a.b=0 and axxb=0 . What can you conclude about the vectors a and b?

In a parallelogram ABCD, angleDAB = 40^(@) find the other angles of the parallelogram.

Given that y=x^2+6 and x=-1 , what can we conclude about the value of y ?

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

The opposite angles of a parallelogram are (3x-2)^(@) and (x+48)^(@) . Find the measure of each angle of the parallelogram.

If the area of the parallelogram with vec(a) and vec(b) as two adjacent sides is 15 sq. units, then the area of the parallelogram having 3vec(a)+2vec(b) and vec(a)+3vec(b) as two adjacent sides in sq. units is

The area of the parallelogram with vec a and vec b as adjacent sides is 20 sq. units. Then the areaof the parallelogram having 7 vec a + 5 vec b and 8 vec a + 11 vec b as adjacent sides is

Given statements in (a) and (b). Identify the statements given below as contrapositive or converse of each other. (b) If a quadrilateral is a parallelogram, then its diagonals bisect each other. (i) If the diagonals of a quadrilateral do not bisect each other, then the quadrilateral is not a parallelogram. (ii) If the diagonals of a quadrilateral bisect each other, then it is a parallelogram.

In the adjacent figure ABCD is a parallelogram P and Q are the midpoints of sides AB and DC respectively. Show that PBCQ is also a parallelogram.

Given that all women are mortal, and suppose that A is a woman, what can we conclude about A ?