1.
17. ABCD is a quadrilateral in which AD BC If P, Q, R, S be the mid-points of AB, C and
respectively, then show that PORS is a rhombus.
18. In an isosceles AABC, the base AB is produced both the ways to P and O such that AP,
that AAPC - ABCO .
BQ-AC
12
Answers
Answered by
1
Answer:
In △BAD, P and S are mid-points of AB and BD
⇒ PS∥AD and PS=
2
1
AD --- ( 1 ) [ By BPT ]
Similarly in △CAD,
⇒ OR∥AD and QR=
2
1
AD --- ( 2 )
From ( 1 ) and ( 2 ), we get
⇒ PS∥QR and PS=QR=
2
1
AD ------ ( 3 )
In △BDC, we get
⇒ SR∥BC and SR=
2
1
BC ----- ( 4)
And in △ABC
PQ∥BC and PQ=
2
1
BC ------ ( 5 )
⇒ PQ∥SR, PQ=SR=
2
1
BC ---- ( 6 ) [ From ( 4 ) and ( 5 ) ]
∴ □PQRS is a parallelogram.
Now, AD=BC
∴
2
1
AD=
2
1
BC
∴ PS=QR=PQ=SR [ From ( 3 ) and ( 6 ) ]
∴ □PQRS is a rhombus.
Answered by
1
Step-by-step explanation:
dear buddy the answer is correctly given by pravalka deedi.
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