Rewrite the followings using ‘if, then’:' (it) A quadrilateral is a parallelogram, if its diagonals bisect each other

Rewrite the followings using ‘if, then’:' (iii) x > y rarr x + 5 > y + 5

Rewrite the followings using ‘if, then’:' (v) I shall visit you tomorrow, if ifis a holiday,

Rewrite the followings using ‘if, then’:' (iv) Atmospheric humidity increases only if it rains.

Name the quadrilaterals whose diagonals. bisect each other

Determine the truth value of the following statement. A quadrilateral is a parallelogram if and only if its opposite sides are parallel.

Rewrite the followings using ‘if, then’:' (i) You will be called for interview, if you pass in the written test.

Name the quadrilaterals whose diagonals. are perpendicular bisectors of each other

prove by using the principle of similar triangles that: the diagonals of of a parallelogram bisects each other.

Prove that in any quadrilateral the sum of the diagonals is greater than its semi—perimeter.

The length of one diagonal of a parallelogram is 8 cm. and height of each of the triangles whose common base is the given diagonal of the parallelogram is 4 cm. Find the area of the parallelogram.