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@mm CD w#t]y pr]hrN@y\q} ym| g#tUvk\ a#w]v[v @h`w\ phw aAkyt apv amwn\n.

@mm CD w#t]y pr]hrN@yq} ym| g#tUvk a#w]v[v @h`w phw aAkyt apv amwn<br>. r`j ]w jyv }r (v]@XS gN ]w p[h[N[) 0718005616 @h` 0343341702. Exit. gN]wy. bh[asY rdð; chùr YS% O¾ulS¾;s msßfjk fld,a¨msáh. Exit. Mathematics. Polygons Rajitha Jayaweera Sri Dharmakeerthi Piriwena

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@mm CD w#t]y pr]hrN@y\q} ym| g#tUvk\ a#w]v[v @h`w\ phw aAkyt apv amwn\n.

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  1. @mm CD w#t]y pr]hrN@y\q} ym| g#tUvk\ a#w]v[v @h`w\ phw aAkyt apv amwn\n. r`j]w jyv}r (v]@X\S gN]w p[h[N[) 0718005616 @h`\ 0343341702 Exit

  2. gN]wy bh[asY rdð; chùr YS% O¾ulS¾;s msßfjk fld,a¨msáh Exit

  3. Mathematics • Polygons • Rajitha Jayaweera • Sri Dharmakeerthi Piriwena • Kollupitiya Exit Next

  4. XY} Er~mk}r~w] p]r]@vn @p`l\vw\w pAsl @k`l\l[p]t]y l[m|b]N] @kt]v]\\l vw\w n`@g`d kUwr r`j]w jyv}r(0718005616 @h`\ 0602341702) Exit Next

  5. bh[asY Polygons • p`q w;nk\ @h`\ It v’#d] gNnk]n\ smn\v]w sAv^w wl r$py bh[asYyk\ yn[@vn\ hÁ[n\vy]. • (1) w]Y@k`\N Triangle • (2) cw;rsY Quadrileteral • (3) pAc`sYy Pentagon • (4) Sd`sYy Hexagon • (5) sp\w`sYy Septagon • (6) aS\T`sYy Octagon • (7) nv`sYy Nonagon • (8) qs`sYy Decagon

  6. .Ks;h ;s%fldaK Triangle ;s%fldaK yeoskaùu ;s%fldaK mdo wkqj kï lsÍu ;s%fldaK fldaK wkqj kï lsÍu ;s%fldaKhl ,laIK r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y m%Odkfukqjg

  7. mdo ;=klska jgjqkq ixjD; ;,rEmh ;s%fldaK hkqfjka y¥kajhs m%Odkfukqjg ;s%fldaK yeoskaùu r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  8. ;s%fldaK mdo wkqj kï lsÍu • (1)iumdo ;%sfldaaKEquilatoral Triangle • (2)iu oaú mdo ;%sfldaaK Isosceles Triangle • (3)úIu mdo ;%sfldaaK Scalene Triangle m%Odkfukqjg r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  9. iumdo ;%sfldaaK Equilatoral Triangle mdo ;=k tlsfklg iudkjQ ixjD; ;,rEmh iumdo ;s%fldaK hkqfjka y¥kajhs m%Odkfukqjg rdð; chùr YS% O¾ulS¾;s msßfjk fld,a¨msáh

  10. iu oaú mdo ;%sfldaaK Isosceles Triangle • mdo folla Mlsfklg iudkjQ ixjD; ;,rEmh iu oaú mdo ;s%fldaK hkqfjka y¥kajhs m%Odkfukqjg rdð; chùr YS% O¾ulS¾;s msßfjk fld,¨msáh

  11. úIu mdo ;%sfldaaKScalene Triangle • mdo Mlsfklg wiudkjQ ixjD; ;,rEmh úIu mdo ;%sfldaaK hkqfjka y¥kajhs m%Odkfukqjg rdð; chùr YS% O¾ulS¾;s msßfjk fld,¨msáh

  12. ;s%fldaK fldaK wkqj kï lsÍu • (1)iq¿fldaKS ;%sfldaaKAcute-angled Triangle • (2)iDPq fldaKS ;%sfldaaK Right- angled Triangle • (3)uyd fldaKS ;%sfldaaKObtuse-angled Triangle • m%Odkfukqjg rdð; chùr YS% O¾ulS¾;s msßfjk fld,a¨msáh

  13. iq¿fldaKS ;%sfldaaK Acute-angled Triangle • ;%sfldaaKhl úId,u fldaKh iq¿ fldaKhl  fõkñ Mh iq¿fldaaKS ;%sfldaaKhla hkqfõka y÷kajhs m%Odkfukqjg r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  14. iDPq fldaKS ;%sfldaaKRight- angled Triangle • ;%sfldaaKhl úId,u fldaKh iDPq fldaKhl  fõkñ Mh Rcq fldaKS ;%sfldaaKhla hkqfõka y÷kajhs m%Odkfukqjg r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  15. uyd fldaKS ;%sfldaaKObtuse-angled Triangle • ;%sfldaaKhl úId,u fldaKh uydfldaaKhla fõkñ Mh uyd fldaKS ;%sfldaaKhla hkqfõka y÷kajhs m%Odkfukqjg r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  16. cw;rsY Quadrileteral • p`q hwrk]n\ smn\v]w sAv^w wl r$py cw;rs yn[@vn\ hÁ[n\vy]. • cw;rs vr~g • (1) smcw;rsYy(Square) • (2) Äj[@k`\N`sYy(Rectangle) • (3) @r`m|bsy(Rhombus) • (4) sm`n\wYr`sYy(Parallelogram) • (5) wYp}s]ym(Trapesium) r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y pYE`n @mn[v

  17. (1) smcw;rsYy (Square) • p`q hwr h` @k`\N hwr ek]@nkt sm`n sAv^w wl r$py smcw;rsY yn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  18. (2) Äj[@k`\N`sYy (Rectangle) • sm|m[K p`q sm`n h` @k`\N hwr ek]@nkt sm`n v{ (ek\ @k`\Nyk\ 900 b#g]n\ v{) cw;rsYy Äj[@k`\N`sYy yn[@vn\ hÁ[n\vy]. pYEn @mn[vt

  19. (3) @r`m|bsy(Rhombus) • sm|m[K p`q sm`n\wr v{ h` s]yU p`q sm`n h` cw;rsYy @r`m|bsy yn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  20. (4) sm`n\wYr`sYy (Parallelogram) • sm|m[K p`q sm`n h` sm`n\wr v{ cw;rsYy sm`n\wYr`sYy yn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  21. (5) wYp}s]ym (Trapesium) • ek\ sm|m[K p`qy[glyk\ pmnk\ sm`n\wr v{ cw;rsYy wYp}s]ym yn[@vn\ hÁ[n\vy]. r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y pYEn @mn[vt

  22. pAc`sYy (Pentagon) • p`q phk]n\ smn\v]w sAv^w wl r$py pAc`sYy yn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  23. Sd`sYy (Hexagon) • p`q hyk]n\ smn\v]w sAv^w wl r$py Sd`sYy yn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  24. sp\w`sYy(Septagon) • p`q hwk]n\ smn\v]w sAv^w wl r$py sp\w`sYy yn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  25. aS\T`sYy(Octagon) • p`q atk]n\ smn\v]w sAv^w wl r$py aS\T`sYy yn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  26. nv`sYy (Nonagon) • p`q nvyk]n\ smn\v]w sAv^w wl r$py nv`sYy yn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  27. qs`sYy(Decagon) • p`q qhyk]n\ smn\v]w sAv^w wl r$py qs`sYyyn[@vn\ hÁ[n\vy]. pYEn @mn[vt r`j]w jyv}r XY} Er~mk}r~w] p]r]@vn @k`l\l[p]t]y

  28. ;s%fldaKhl ,laIK • ;s%fldaKhlwNHka;rfldaK ;=fka Ml;=j 180xfõ • ;s%fldaKhlndysrfldaK ;=fka Ml;=j 360xfõ' m%Odkfukqjg

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