Marking Scheme

SRE-109
21
( ) ………….(i)
( ) ………….(ii) 1
1
from (i) and (ii)
( )
1
( )
1
Putting the value of
22
( )
Note : Give relevant marks for other methods.
1
1
1
1
1
[ Give full marks for alternative correct and appropriate proof]
23 Proof
1
̂ ̂
̂ ̂ 1
̂
1
̂
=
24 For two correct circles with radii at least 3 cm 1
For correct measurement with table 2
For correct conclusion 1
6