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Mathematics
Mathematics
Problem
In parallelogram
P
Q
R
S
PQRS
P
QR
S
, points
A
A
A
and
B
B
B
are the midpoints of sides
P
Q
PQ
P
Q
and
P
S
PS
P
S
respectively. a. (i) Prove that
A
B
∥
Q
S
AB \parallel QS
A
B
∥
QS
. b. (ii) If
Q
S
=
18
cm
QS = 18\,\text{cm}
QS
=
18
cm
, find the length of
A
B
AB
A
B
.
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