Page 49 - Grade 10 C.Math

oxfF cfotsf] nDafO / lqe'hsf] cfwf/sf] gfk Pp6} ePsfn] a/fa/ x'G5 . cfotsf] prfO
lqe'hsf] prfOsf] cfwf dfq x'G5 . cfotsf] prfO (b) = h; hxfF h = lqe'hsf] prfO
xf] . lqe'hsf] If]qkmn / cfotsf] If] qkmn a/fa/ x'G5 .

ABC sf] If]qkmn = cfotsf] nDafO x rf}8fO

= BC x ( h) = BC x AD

ct M lqe'hsf] If]qkmn = cfwf/ x prfO x'G5 .
A

;dsf]0f lqe'hsf] If]qkmn (Area of a right angled triangle)
xfdLnfO{ yfxf 5, s'g} klg lqe'hsf] If]qkmn nDa (p)

= x cfwf/ x prfO x'G5 . jf prfO
(h)
cyf{t lqe'hsf] If]qkmn = cfwf/ x prfO

ABC = x BC x AB C B
cfwf/ (b)
t;y{ ;dsf]0f lqe'hsf] If]qkmn = x cfwf/ (b) x prfO (p)

[ oxfF, b cfwf/ / h prfO x'G5 .]

Curriculum Development Centre
= x bh
;dafx' lqe'hsf] If]qkmn (Area of an equilateral triangle)
A
lj|mofsnfk 2
e'hfsf] nDafO a ePsf] Pp6f ;dafx' lqe'h ABC sf] /rgf
ug'{xf];\ . cfwf/ BC sf] dWolaGb' D / zLif{laGb' A hf]8]/ nDa a a
AD lvRg'xf];\ h;nfO{ lqe'h ABC sf] prfO klg elgG5 . h

2
2
2
;dsf]0f ADC df -s0f{_ = -cfwf/) ± -nDa_ x'G5 .
B C
2
cyjf, a = + (h) 2 a/2 D a/2
a
a = + h = a - = h 2 ;dafx' lqe'hsf] zLif{laGb'af6
2
2
2
cfwf/ e'hfdf lvlrPsf] nDan]
cyjf, cyjf, 
cfwf/ e'hfnfO{ cfwf kfb{5 .
 
oxfF lqe'hsf] If]qkmn = x cfwf/ x prfO ;"q k|of]u ug{ ;lsG5 .

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