Question

art Answer Type-Il Questions (3 Marks)
11 Show that quadrilateral PQRS formed by
vertices P (22,5), Q (7,10), R (12, 11) and
S (3,24) is not a parallelogram. [CBSE 2015]
12. Show that the points A (5, -1), B (8,3),
C(4,0) and D (1,-4) are the vertices of a
rhombus.
[CBSE 2015)
13. In the given figure, in A ABC, D and E are
the mid-points of the sides BC and AC​

Answer 1

Answer:

Step-by-step explanation:

P (22,5), Q (7,10), R (12, 11) and

S (3,24)

Mid point of diagonal PR is (22+12/2,5+11/2) or (16,8)

Mid point of diagonal QS is(7+3/2,24+10/2) or (5,17)

So mid points of diagonals are different.

Hence diagonals do not bisect each other

Hence PQRS is not a parallelogram