SCERT Kerala State Syllabus 10th Standard Maths Textbooks Malayalam Medium Part 1

{XntImW- a- nXn (1) ChnsS hc-¨n-cn-¡p¶ {XntIm-W- ¯nÂ, apI-fnse aqe-bnÂ\\n¶v 120o Xmgs¯ hi-t¯-¡pÅ ew_-Zqcw F{X-bmWv? {XntIm-W-¯nsâ ]c-¸- fhv F{X-bmWv? (2) NphsS ImWn-¨n-cn-¡p¶ kmam-´-cn-I§Ä Hmtcm-¶n-epw, Xmg- s¯bpw apI-fn-e-s¯bpw hi-§Ä X½n-epÅ AIew IW-¡m- ¡pI. Hmtcm-¶nsâbpw ]c-¸-fhpw IW-¡m-¡pI: (3) Hcp NXp-c-¸-eI hnIÀW-¯n-eqsS tImWn\\p asämc- f- hv apdn¨v, Nn{X-¯n Im-Wn-¨n-cn-¡p-¶-Xp- Hcp tImWnsâ Un{Kn t]mse amän-b-Sp-¡n, Hcp ka-`p-P-{Xn- tIm-W-ap-­m-¡Ww. {XntIm-W-¯nsâ Af-sh-¶m F´m- s hi§- Ä 50 skân-ao-ä-dp-am-I-Ww. NXp- sW¶p I­tÃm: Hcp tImWnsâ aqe c-¯nsâ \\ofhpw hoXnbpw F{X-bm- tI{µ-am¡n ]e hen-¸- r bn-cn-¡Ww? ¯n-epÅ hr¯-§Ä hc- (4) c­p NXp-c-§Ä hnIÀW-¯n-eqsS ¨m Ah-bpsS Npä-fhpw tImWn-\\p-Ånse Nm]-¯nsâ \\ofhpw amdp-sa-¦nepw hr¯- apdn¨p {XntIm-W-§-fm-¡n, asämcp ¯nsâ F{X `mK-amWv Nm]-sa-¶Xv amdp- NXp-c-t¯mSp tNÀ¯ph¨v Nph-sS-¡m- ¶n-Ã. AXm-b-Xv, Nn{X¯- nse s Dw r Dw amdp- Wn¨- nc- n¡- p¶- X- pt- ]mse Hcp kaj- U- v`p- P-ap-­m-¡Ww: sa¦- ne- pw, s amdp¶- nsöpw, AXns\\ 360 2πr jUv`p-P-¯nsâ hi-§-fpsS \\ofw 30 sIm­p KpWn-¨-XmWv Un{Kn Af-sh¶pw skâ n-ao-äÀ BI-W-sa-¦n NXp-c-§- fpsS \\ofhpw hoXnbpw F{X-bm-bn-cn- ]dªp. AXmb- X- ,v tImWnsâ Un{Kn Afhv ¡Ww? = s ×360. CXnse s, r Ch amdn-bmepw 2πr 2π, 360 F¶o kwJy-IÄ amdp-¶n-Ã-tÃm. At¸mÄ tImW-f-¡m³ s FSp- r ¯mÂt¸mtc? Cu Af-hn-s\\-bmWv tImWnsâ tdUn-b³ (radian) Afhv F¶p ]d-bp-¶-Xv. AXm-b- Xv, apI-fnse Nn{X-¯nÂ, tImWnsâ tdUn-b³ Afhv = s . r Un{Kn Afh- ns\\ kqNn¸- n¡- m³ ° F¶ Nnlv- \\-am-WtÃm D]-tbm-Kn-¡p-¶-Xv. tdUn-b³ Af-hns\\ kqNn-¸n-¡m³ rad F¶mWv Fgp- Xp-¶-Xv. Cu Bibw BZya- mbn AhX- c- n¸- n¨- X- v, ]Xn- s\\«mw\\qäm-­n Cw¥-­n Pohn-¨n-cp¶ tdmPÀ tImSvkv (Roger Cotes) F¶ KWn- X-im-kv{X-Ú-\\mWv. tdUn-b³ F¶ t]cp sImSp¯- X- v, ]s¯m¼- Xmw \\qäm­- n Cw¥- ­nse sPbnwkv tXmwk¬ (James Thomson) F¶ `uXnIimkv{X-Ú-\\pw. 103