Straight Line and Pair of Straight Lines 1 Question 33
33. The diagonals of a parallelogram are along the lines and . Then, must be a
(a) rectangle
(b) square
(c) cyclic quadrilateral
(d) rhombus
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Solution:
- Slope of line
is and slope of line is 3 .
Here,
Therefore, these two lines are perpendicular which show that both diagonals are perpendicular.
Hence,