8th mtaths samacheer complete tamil medium part 4

8/6/2019 8th Mtaths samacheer complete tamil medium PART 4

1/23

4msitf

4.1 mKf

gl 4.1

js cUtf gf sf, nfhzf, gugsf,Rwsf kW fd cUtf wguf, fd msfMatiw vLJiuF fj it msa vnwh.

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1 www.errsm.org


2/23

msitf

id Tf

(i) gugs

(ii) Rws

gl 4.2

(iii)tl

7

22 myJ 3.14

F: t l ika nfhz = 3 0.

Perimeter vwMy brhYF

Rws vW bghU.

nuf bkh

Peri vwh RvW meter vwh sl vW

bghUgL.

gl 4.3

gl. 4.4

O

gl 4.5

360

AO

. v Mu gugs Rws

1.

2.

3.

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2 www.errsm.org


3/23

gl 4.8

gl 4.12

4.2 miutlf kW fh tlf

4.2.1 miu tl

F: miu tl ikanfhz 180.

(m) miutl Rws

(M) miutl gugs

4.2.2 fh tl

F: fh t l ika nfhz 90.

gl 4.6

(m) (M)gl 4.7

gl 4.9

gl 4.10

D

A B

C

O

gl 4.11

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3 www.errsm.org


4/23

msitf

(m) fh tl Rws

(M) fh tl gugs

vLJfhL 4.1

vLJfhL 4.2

gl 4.13

gl 4.14

gl 4.15

gl 4.16

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5/23

vLJfhL 4.3

vLJfhL 4.4

gl 4.18

gl 4.17

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6/23

msitf

g 4.1

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7/23

4.3 TL cUtf

gl 4.19

cUtf iz

iy (Juxtaposition) vgJ y

js cUtf x gf

sij kbwh xj gf

sF rkkhf mLjLJ

itJ cUthffgL mik

F.

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7 www.errsm.org


8/23

msitf

.

s cUtf iz iy

1.uL mrk gfKnfhzf

ehfu

.U brnfhzKnfhzf kWbrtf

rtf

.MW rk gfKnfhzf

mWnfhz

(m) gynfhz

(M) xGF gynfhz

A B

D

A

D

B

D

E

A

gynfhz vgJ _W myJ

mjF nkgl gffis

bfhl nenfhL cUt MF.

gl 4.21

gl 4.22

gl 4.20

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8 www.errsm.org


9/23

() xGfw gynfhz

(


10/23

msitf

t.v

Ut

gacUt gugs (A) rJu

yFfRws (P) myFf

1. Knfhz h2

1 AB + BC + CA

2.brnfhz

Knfhz

h2

1b (mo + cau +

fz)

3.rkgf

Knfhz

a4

3

( 3 - 1.732)

AB+BC+CA = 3a ;

brFJ, h = a2

3

myFf

4.U rk gf

Knfhza

2a +2 a 2

5.mrk gf

Knfhz

)s

sa c

2=

+

AB CA+

= hb c

6. ehfu )2

1

AB + BC + CD + DA

7. izfu h 2 ( + b)

8. brtf l b 2 (l + b)

9. rtf 2

1 # ( +b) AB + BC + CD + DA

10. rhrJu2, Mad _iy

lf v

gugs2

12#

4a

11. rJu 2 4

A

B C

BA

D

C

h

h 2

A

B C

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11/23

vLJfhL 4.5

gl 4.25

gl 4.26 gl 4.27

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11 www.errsm.org


12/23

msitf

.3 1 732

vLJfhL 4.6

gl 4.28

gl 4.29

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12 www.errsm.org


13/23

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13 www.errsm.org


14/23

msitf

miutl EC gugs + miutl FA gugs

= miutl AD gugs

vLJfhL 4.7

gl 4.30

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14 www.errsm.org


15/23

vLJfhL 4.8

vLJfhL 4.9

gl 4.34

gl 4.31

gl 4.32

br 7br

7/2br 7/2br

gl 4.33

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15 www.errsm.org


16/23

msitf

vLJfhL 4.10

vLJfhL 4.11

gl 4.35

gl 4.36

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16 www.errsm.org


17/23

vLJfhL 4.12

vLJfhL 4.13

gl 4.37

gl 4.38

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17 www.errsm.org


18/23

msitf

vLJfhL 4.14

gl 4.39

gl 4.40

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18 www.errsm.org


19/23

rtf KBCM gugs, A1vf.

rtf LEFJ gugs, A2

vf.

brnfhz Knfhz ABK gugs, A3

vf.

brnfhz Knfhz MCD gugs, A4

vf.

brnfhz Knfhz DEL gugs, A5 vf.

brnfhz Knfhz JFA gugs, A6

vf.

a

a

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19 www.errsm.org


20/23

msitf

g 4.2

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21/23

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21 www.errsm.org


22/23

msitf

cfsh vWF cjt Kokh?

vJ aJ?

rJu Rws myJ rJu csla

tl Rws?

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23/23

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8th mtaths samacheer complete tamil medium part 4

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