Point, Line Segment, Line aur Ray

Class 6 Maths · Chapter 2: Lines aur Angles · NCERT Ganita Prakash section 2.1–2.4

Seekho

Geometry point se shuru hoti hai: ek pakki jagah, bilkul bina size ke. Hum use chhote dot se dikhate hain aur capital letter naam dete hain: point Z, point P, point T.

Do points A aur B lagao. A se B ke saare raaston mein sabse chhota raasta line segment AB (ya BA) hai. A aur B iske end points hain. Kaagaz ki tah (fold) line segment jaisi dikhti hai.

Ab segment AB ko A ke aage aur B ke aage bina ant ke badhao. Ye line AB hai. Ise dono taraf arrows ke saath banate hain, aur kabhi chhote letter jaise l ya m se naam dete hain. Ise poora kabhi nahi bana sakte!

Ek point se anginat lines guzar sakti hain. Do points se theek ek line guzarti hai.

Ray ek point se shuru hokar ek disha mein bina ant ke jaati hai, jaise torch ya lighthouse ki roshni. Ray AP, A se shuru hokar P se guzarti hai. Starting point hamesha pehle likhte hain.

Explore: geo board use karo. Tool chuno, phir draw karne ke liye do points tap karo.

1. Line segment AB banao.
2. Ray CD banao (C se shuru hokar D se guzarti hai).
3. Line BD banao.

Yaad rakho

• Point: theek jagah, capital letter se naam.
• Line segment AB: A se B ka sabse chhota raasta; do end points.
• Line: dono taraf hamesha chalti hai. Ray: ek point se shuru, ek taraf hamesha.
• Do points se theek ek line guzarti hai.

Quick check

Inme se kiske theek do end points hote hain?

1. Line
2. Ray
3. Line segment
4. Point

Socho

Ray OA, O se shuru hokar A se guzarti hai, aur B se bhi. Kya ise ray OB keh sakte ho? Ray AO?

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.