Kalakaari

Class 6 Maths · Chapter 8: Constructions se Khel · NCERT Ganita Prakash section 8.1

Seekho

Zoya ek greeting card bana rahi hai. Use kone mein ek ekdum gol suraj chahiye. Wo pencil se dhaaga baandhti hai, doosra sira ungli se dabaaye rakhti hai, aur pencil ghumaati hai. Line ka har point ungli se barabar door hai. Ye shape gola (circle) hai.

Ruka hua point centre hai. Centre se gole tak ki doori radius hai. Compass wahi kaam karta hai jo dhaaga: use radius jitna kholo, nukeeli nok centre par rakho, aur ghumao.

Gole ka hissa arc kehlata hai. Card ki border ke liye Zoya ek line par 1 cm radius ke aadhe gole banati hai, ek upar aur ek neeche. Har aadha gola line ka 2 cm (ek diameter) leta hai, isliye 8 cm ki line mein 4 aate hain.

8 ÷ 2 = 4 half circles

Same radius ke gole sundar patterns banaate hain. Ek gola banao, phir compass ki nok uske kisi point par rakhkar same radius ka doosra gola banao. Ghoomte raho: phool ban jaata hai!

Explore: tumhara compass board. Compass kholo, phir dot par tap karke banao.

1. O centre aur 2 cm radius ka gola banao.
2. O centre wala gola banao jo A se guzre.
3. P centre aur 1.5 cm radius ka gola banao.

Yaad rakho

• Gole ke saare point centre se barabar doori (radius) par hote hain.
• Compass gole aur arcs banata hai. Diameter = 2 × radius.

Quick check

Gole ka radius 4 cm hai. Point K centre se 4 cm door hai. K kahan hai?

1. Gole par
2. Gole ke andar
3. Gole ke bahar
4. Centre par

Socho

Point P se theek 3 cm door saare points socho. Wo kaunsi shape banaate hain? Aur jo P se 3 cm se kam door hain?

Practice

Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.