त्रिज्याखण्ड का क्षेत्रफल कैसे ज्ञात करें ? | Class 10th math ex 11.1 | Trijyakhand kya hai #shorts

Class 10th math chapter 11 ex 11.1 in hindi by vikas sir #shorts #class10th #education #upboard #maths #ncert #upboardexam2026 #asanganit