Chapter 8: Constructions se Khel
Sirf ruler, compass aur nukeeli pencil se tum gole, lehrein, phool, ekdum sahi rectangles aur squares bana sakte ho. Is chapter mein hum golon se kalakaari karenge, seekhenge ki rectangle ya square kya banata hai, unhe step-by-step banayenge, unke diagonals khojenge, aur golon se do jagahon se barabar door points dhoondhenge.
Is chapter mein tum
- compass se gole aur arcs banana aur patterns banana
- rectangles aur squares ke gun jaanna
- di gayi maap se rectangles aur squares banana
- golon se do points se barabar door points dhoondhna
Topics
- Kalakaari NCERT 8.1
Gole ke saare point centre se barabar doori (radius) par hote hain.
- Squares aur Rectangles NCERT 8.2
Rectangle: aamne-saamne ki bhujaayein barabar, saare kon 90°.
- Squares aur Rectangles Banana NCERT 8.3
Kachcha sketch construction plan karne mein madad karta hai.
- Rectangles mein ek Khoj NCERT 8.4
XY sabse chhota (AB ke barabar) tab hai jab X aur Y, A aur B se barabar door hon.
- Rectangles aur Squares ke Diagonals NCERT 8.5
Rectangle ke diagonals barabar hote hain aur ek doosre ko aadha kaat-te hain.
- Do Points se Barabar Door Points NCERT 8.6
B aur C se barabar door points: dono ke chaaron or barabar gole (ya arcs) banao; wo un points par milte hain.
Key words
- Circle
- centre se barabar doori wale saare points
- Radius
- centre se gole tak ki doori
- Arc
- gole ka hissa
- Compass
- gole banane aur lambai utaarne ka aujaar
- Diagonal
- aamne-saamne ke konon ko jodne wali line
- Equidistant
- barabar doori par
Summary
- Gole ke saare points centre se barabar doori, radius, par hote hain.
- Compass gole aur arcs banata hai aur lambai theek utaarta hai.
- Kachcha sketch construction plan karne mein madad karta hai.
- Rectangle uski do bhujaon se, ya ek bhuja aur ek diagonal se banaya ja sakta hai.
- Rectangle ke diagonals barabar hain aur ek doosre ko aadha kaat-te hain; square mein 90° par bhi kat-te hain.