1. Javobi Y e ch i sh: S = 2 formulaga ko’ra S = 2=(sm2)
1. Javobi Y e ch i sh: S = 2 formulaga ko’ra S = 2=(sm2)
J a v o b: S = sm2 .
2. Javobi Yechish. S = 2 formulada, S=12,56; =3,14 desak, 12,56=3,14* r2, bundan r2=4. Qanday sonni o’z-o’ziga ko’paytirilsa, 4 chiqadi? r * r =2 * 2, demak, r = 2 (sm). Javob: r = 2 sm.
Darslik bilan ishlash.
Mavzu yuzasidan darslikdan misol yechish.
314 – masala 315 – masala
Doskada ikki guruh a’zolaridan ikkita o’quvchi masala yecha olish.
Diyametri 4 dm bo’lgan aylana uzunligini toping.
Radiusi 5 dm bo’lgan aylana uzunligini toping
320-masala
Radiusi 5,5 sm
Radiusi 10,8 dm bo’lgan doira yuzini toping.
Tarqatma bilan ishlash
1. Radiusi 5 sm bo’lgan aylana uzunligini toping.
2. Radyusi 9 dm bo’lgan doira yuzini hisoblang.
3. Aylana deb nimaga aytiladi.
4. Aylana radiusi deb nimaga aytiladi.
5. Aylana va doiraning farqi nimada.
6. Aylana formulasini yozing.
7. Doira yuzini hisoblash formasini toping.
8. Aylanaga hayotdan misollar keltiring.
Mustaqil tahlil
1 – guruh.
- Diyametri 50 sm, 100 sm bo’lgan aylana uzunligini toping.
- Radiusini 6 dm, 10 dm, bo’lgan doira doirasini toping.
2 – guruh.
- Diyametri 20 mm 30 sm bo’lgan aylana uzunligini toping.
- Radiusini 8 dm, 20 dm bo’lgan doira yuzini toping.