Page 135 - Grade 10 C.Math

;dLs/0f (i) / (ii) hf]8\bf
x + y = 75°
x – y = 15°
2x = 90°

cyjf, x = 45°
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x sf] dfg ;dLs/0f (i) df /fVbf
45° + y = 75°

cyjf, y = 75° - 45° = 30°

pSt sf]0fx¿ 45° / 30° /x]5g\ .

pbfx/0f 2

Pp6f cfotfsf/ kf]v/Lsf] kl/ldlt 100 ld6/ 5, olb rf}8fOeGbf nDafO 10 ld6/n] a9L 5 eg]
To; kf]v/Lsf] If]qkmn slt x'G5 < kTtf nufpg'xf];\ .

;dfwfg
dfgf}F, kf]v/Lsf] nDafO 'l' ld6/ / rf}8fO 'b' ld6/ 5 .

k|Zgcg';f/ 2l + 2b = 100

cyjf, l + b = 50 ......... (i)
b
k]ml/, bf];|f] ;t{cg';f/ l - b = 10 ....... (ii)

;dLs/0f (i) / (ii) nfO{ hf]8\bf l

2l = 60
cyjf l = 30 ld6/

l sf] dfg ;dLs/0f (ii) df /fVbf

30 - b = 10
cyjf, b = 20 ld6/

ct M If]qkmn, l x b = 30 x 20 = 600 ju{ ld6/

132 ul0ft, sIff – 10