Chapter 9: Jyamitiya Judwaan
Do aakaar kab ek doosre ki bilkul nakal hote hain? Is chapter mein hum sarvangsam aakaar samjhenge, kaunse thode maap do tribhujon ki sarvangsamta pakki karte hain (SSS, SAS, ASA, AAS, RHS), sarvangsamta sahi kaise likhein, aur sarvangsamta se saabit karenge ki isosceles tribhuj ke aadhaar angles barabar hain.
Is chapter mein tum
- sarvangsam aakaar pehchaanna
- SSS, SAS, ASA, AAS aur RHS use karna
- milte shirshon ke saath sarvangsamta likhna
- isosceles aur samabahu tribhuj mein angles nikaalna
Topics
- Jyamitiya Judwaan NCERT P2 1.1
Sarvangsam aakaaron ka aakaar aur maap same; ek doosre par theek baithta hai.
- Tribhujon ki Sarvangsamta NCERT P2 1.2
SSS, SAS, ASA, AAS aur RHS sarvangsamta pakki karte hain; AAA aur SSA nahi.
- Isosceles aur Samabahu Tribhuj ke Angles NCERT P2 1.3
Barabar bhujaon ke saamne ke angles barabar.
Key words
- Congruent
- wahi aakaar aur maap
- Corresponding parts
- ek aakaar doosre par rakhne par milne wale shirsh, bhujaayein, angles
- SSS / SAS / ASA
- teen bhujaayein; do bhujaayein aur beech ka angle; do angles aur beech ki bhuja
- AAS
- do angles aur beech se bahar ki bhuja
- Hypotenuse
- right angle ke saamne ki bhuja
- RHS
- right angle, hypotenuse aur ek bhuja
Summary
- Sarvangsam aakaaron ka aakaar aur maap same; ghumaana-palatna chalta hai.
- SSS, SAS, ASA, AAS aur RHS tribhujon ki sarvangsamta pakki karte hain; AAA aur SSA nahi.
- △ABC ≅ △XYZ mein aksharon ka kram batata hai kaunse hisse milte hain.
- Barabar bhujaon ke saamne ke angles barabar; samabahu tribhuj mein teen 60° angles.