Page 55 - Grade 10 C.Math
P. 55
pbfx/0f 6
cfwf/ e'hfsf] nDafO 16 ;]=ld= ePsf] Pp6f ;dlåafx' lqe'hsf] If]qkmn 120 ju{ ;]=ld= eP
afFsL e'hfsf] gfk kTtf nufpg'xf];\ .
;dfwfg
dfgf}F, oxfF, a/fa/ e'hfx¿ AB = AC = a 5g\ / cfwf/ BC = 16 ;]=ld= 5 .
;dlåafx' lqe'hsf] If]qkmn
A
120
cyjf, 120
cyjf, 30
cyjf, 15 B C
16 ;]=ld=
2
cyjf, 225 = a – 64
cyjf, 225 + 64 = a 2
cyjf, 289 = a
2
Curriculum Development Centre
a = 17 ;]=ld=
pbfx/0f 7
cw{ kl/ldlt 10 ;]=ld= / Pp6f e'hfsf] gfk 9 ;]=ld= ePsf] Pp6f lqe'hsf] If]qkmn ju{
;]=ld= 5 eg] pSt lqe'hsf afFsL e'hfx¿sf] gfk kTtf nufpg'xf];\ .
;dfwfg
oxfF, cw{ kl/ldlt (s) = 10 ;]=ld=
Pp6f e'hf (a) = 9 ;]=ld=
If]qkmn (A) = ju{ ;]=ld=
afFsL e'hfx¿ b = ? / c = ?
ca, a + b + c = 2s = 2 x 10
cyjf, a + b + c = 20
cyjf, b + c = 20 - 9 = 11
52 ul0ft, sIff – 10
