4. Vektorlarning skalyar ko‘paymasi va ular orasidagi burchakni toping:
va .
5 - nazorat ishi
I variant
1. To‘griburchakli uchburchakning katetlari 40 sm va 42 sm ga teng. Unga tashqi chizilgan aylananing radiusini toping.
2. Teng tomonli uchburchakning perimetri sm ga teng. Unga tashqi chizilgan aylananing radiusini toping.
3. Tomonlari 13, 14, 15 bo‘lgan uchburchakka ichki chizilgan aylana radiusini toping.
4. Kvadratga aylanalar ichki va tashqi chizilgan .Agar tashqi chizilgan aylana radiusi sm ga teng bo‘lsa, unga ichki chizilgan aylana radiusini toping.
II variant
1. To‘griburchakli uchburchakning katetlari 20 sm va 15 sm ga teng. Unga tashqi chizilgan aylananing radiusini toping.
2. Kvadratning perimetri sm ga teng. Unga tashqi chizilgan aylananing radiusini toping.
3. Tomonlari 35, 29, 8 bo‘lgan uchburchakka ichki chizilgan aylana radiusini
toping.
4. Muntazam uchburchakka sm radiusli aylana tashqi chizilgan. Ushbu uchburchakka ichki chizilgan aylana radiusini toping.
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