Chapter 14: Rachnaayein aur Tiling
Sirf compass aur seedhi patti se hum khand aur angles aadhe, angles ki nakal, parallel aur hexagon, sitaare aur mehraab bana sakte hain, aur sarvangsam tribhujon se har rachna saabit kar sakte hain. Phir tiling: tangram, 2 × 1 tiles se grid dhakna, rang ka chatur saboot, aur kaunse aakaar poora farsh dhak sakte hain.
Is chapter mein tum
- perpendicular aur angle bisector banaana
- compass se angle copy aur parallel line
- hexagon, sitaare aur mehraab banaana
- tay karna kab kshetra ya samtal dhak sakta hai
Topics
- Jyamitiya Rachnaayein NCERT P2 6.1
Perpendicular bisector: dono siron se barabar chaap; iske bindu siron se barabar door.
- Tiling NCERT P2 6.2
Tiling: na khaali na overlap; 2 × 1 tiles ko vargon ki even ginti chahiye.
Key words
- Perpendicular bisector
- khand ke madhya-bindu se 90° par line
- Angle bisector
- angle ko do barabar hisson mein baantne wali line
- Regular hexagon
- chhah barabar bhujaayein aur angles (120°)
- Tangram
- 7 tukdon mein kata varg
- Tiling
- na khaali na overlap dhakna
- Tessellation
- poore samtal ki tiling
Summary
- Do binduon se barabar chaap perpendicular bisector par milte; uska har bindu dono se barabar door.
- Angle bisector, angle ki nakal aur parallel barabar chaapon se, sarvangsamta se saabit.
- Radius vritt par 6 baar: bhuja = radius wala regular hexagon.
- 2 × 1 tiles ko even varg (aur barabar rang); samtal tiling ko har kone par 360°.