Since
is a parallelogram and the diagonals of
a parallelogram bisects each other,
2 2 3 6AC OA cm cm
and,
2 2 2 4 .BD OD cm cm
Hence it is proved.
Question: 2
Diagonals of a parallelogram are perpendicular to each
other. Is this statement true? Give reason for your
answer.
Solution:
No; if the parallelogram is a rhombus then the
diagonals are perpendicular to each other. Otherwise,
in all parallelograms, diagonals bisect each other.
Question: 3
Can the angles 110º, 80º, 70º and 95º be the angles of
a quadrilateral? Why or why not?
Solution:
We know that the sum of all angles of a quadrilateral
is 360°.
Here,
110 80 70 95 355 360
So, 110 , 80 , 70 , 95
cannot be the angles of a
quadrilateral.