9-sinf Geometriya nazorat ishi

1) Berilgan aylanaga ichki chizilgan muntazam o’n ikki burchakni yasashni tushuntiring.

2) Tomoni 12 sm bo’lgan muntazam uchburchakka ichki chizligan aylana uzunligini toping.

3) Markaziy burchagi  150⁰ ga teng,  radisusi 18 sm bo’lgan:

1. a) aylana yoyining uzunligini;
2. b) yoyi 150⁰ li sketorning yuzini;
3. d) yoyi 150⁰ li  segmentning yuzini toping.

4) Ushbu yarim doira bo’yalgan qismining yuzi  N ga  teng,

BC yoyning gradus o’lchovi  60⁰  ga , CD yoyning

gradus o’lchovi esa  30⁰   ga  teng. To’liq doiraning
yuzini toping.

Ko’chirib olish: 9-sinf, Geometriya . 7-nazorat ishi.