Page 80 - Grade 10 C.Math

lk|Hd (Prism)
b'O{ ljkl/t 5]psf ;txx¿sf] lardf lsgf/fsf] ;tx;Fu nDa x'g] u/L sf6\bf b]lvg] j|md
;]S;g;Fu ;dfgfGt/ / cg'¿k x'g] 7f]; j:t' lk|Hd xf] .

j|m; ;]S;g (Cross-sec on)

s'g} klg lk|Hddsf] b'O{ cf]6f ljk/Lt 5]psf ;txx¿;Fu ;dfgfGt/ x'g] u/L nDafO;Fu nDa
Curriculum Development Centre
¿kdf sf6\bf b]lvg] efu jf ;txnfO{ j|m; ;]S;g (cross sec on) elgG5 . lk|Hdsf cfwf/sf]

If]qkmn / j|m; ;]S;gsf] If]qkmn a/fa/ x'G5 . t;y{ j|m; ;]S;gsf] If]qkmn lgsfNbf lk|Hdsf]
cfwf/sf] If]qkmn lgsfNg] ul/G5 .

s]xL lk|Hdx¿sf] If]qkmn

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1. angfsf k/f ;txsf Ifqkmn = jjm ;txsf Ifqkmn + 2 cf6f jTtsf Ifqkmn
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2
= 2rl + 2r
= 2r ( l + r) hxfF l = lk|Hdsf] nDafO
2. cfoftfsf/ lk|Hdsf] k'/f ;txsf] If]qkmn = 2 (lb + bh + lh)
3. 3gfsf/ lk|Hdsf] k'/f ;txsf] If]qkmn = 6l 2
4. lqe'hfsf/ lk|Hdsf] k'/f ;txsf] If]qkmn = 2( x b x l) + (ah + bh + ch) -cfwf/ / prfO yfxf
ePsf] cj:yfdf_
= bl + h(a + b + c)
= bl + hp,  p = cfwf/sf] kl/ldlt
5. ljifdafx' lqe'h cfwf/ ePsf] cj:yfdf, If]qkmn =

6. ;dlåafx' lqe'h cfwf/ ePsf] cj:yfdf, If]qkmn =

=

7. ;dafx' lqe'h cfwf/ ePsf] cfwf/df, If]qkmn =

= 

hxfF a = a/fa/ e'hf / h = lk|Hdsf] nDafO cyjf prfO

8. lkHdsf cfotfsf/ ;txsf Ifqkmn = cfwf/sf kl/ldlt / lkHdsf prfOsf u0fg kmn
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= p x h
77 ul0ft, sIff – 10