Sinf: VII 1 dars Sana: Fan: Geometriya. Mavzu: Geometriyaning vujudga kelish tarixi. Geometrik shakllar va jismlar. Eng sodda geometrik shakllar. Nuqta, to`g`­ri chiziq va tekislik. Darsning maqsadi

3.Yangi mavzuni bayon qilish.

1- variant.

1. K nuqta BC kesmaning, P esa, KC kesmaning o’rtasida yotadi.. Agar PC = 14 bo’lsa, BP kesmaning uzunligini toping.

2. P nuqta AB kesmada yotadi, bunda AP : PB = 0,7. Agar Ab = 68 m bo’lsa, AP ning uzunligini toping.

3. Radiusi 30 mm, O markazli aylana yasang. 1) Agar A nuqta O markazdan 25 mm

masofa; 2) nuqta B nuqta O markazdan 30 mm masofa;

3) C nuqta O markazdan 35 mm masofa bo’lsa, nuqtalarning. Shu aylanaga nisbatan

aniqlang.

2- variant.

1. 
   K nuqta BC kesmaning, M esa, KC kesmaningo`rtasidayotadi. Agar
   

BC = 57 bo`lsa, MB kesmaninguzunligini toping.

2. P nuqta AB kesmada yotadi, bunda AP : PB = 0,3. Agar Ab = 91 mbo`lsa, AP ninguzunligini toping.

3. Radiusi 20 mm, O markazli aylana yasang. 1) Agar A nuqta O markazdan 15 mm masofa; 2) nuqta B nuqta O markazdan 20 mm masofa; 3) C nuqta O markazdan 25 mm masofa bo’lsa, nuqtalarning. Shu aylanaga nisbatan

aniqlang.