sinf Geometriya – nazorat ishi I variant

6 – nazorat ishi
I variant

1. 
   Uchburchakning burchaklari 2, 3 va 7 sonlari ga proporsional. Shu burchaklarni toping..
   
2. 
   АВС tengyonli uchburchakning (АВ = ВС) ВСК tashqi burchagi . АВС burchakni toping.
   
3. 
   To‘g‘ri burchakli uchburchakning 10 sm ga teng kateti qarshisida yotgan burchagi ga teng. Gipotenuzaga o‘tkazilgan balandlikning uzunligini toping.
   

II variant
1. Uchburchakning burchaklari 3, 4 va 8 sonlari ga proporsional. Shu burchaklarni toping.
2. BPM tengyonli uchburchakning (BP = ВM) ВPT tashqi burchagi . PMB burchakni toping.
3. АВС to‘g‘ri burchakli uchburchakning АВ gipotenuzasiga CD balandlik o‘tkazilgan. В burchagi ga, BD kesma 1 sm ga teng. АВ gipotenuzaning uzunligini toping.
7 – nazorat ishi
I variant

1. 
   DEK tengyonli uchburchakning DK asosi, EF kesma esa bissektrisasi, DK = 16 sm, . KF, , larni toping.
   
2. 
   Berilgan 17 mm, 19 mm va 22 mm ga teng uchta tomoniga ko‘ra uchburchak yasang.
   

3. Berilgan uchburchakning ikkita bissektrisasini yasang.


II variant

1. 
   ABC tengyonli uchburchakning AC asosi, BD kesma esa bissektrisasi, AC = 18 sm, . AD, , larni toping.
   
2. 
   Berilgan 25 mm, 20 mm va 18 mm ga teng uchta tomoniga ko‘ra uchburchak yasang.
   

3. Berilgan uchburchakning uchta bissektrisasini yasang.


8 – nazorat ishi
I variant
1. ВОС burchak ga teng. , ОК - ВОС burchakning bissektrisasi . КОМ burchakni toping.
2. CDE tengyonli uchburchakning perimetri 26 sm; CE uchburchakning asosi, DB esa bissektrisasi, DBE uchburchakning perimetri 20 sm. DB ni toping.
3. АВС uchburchakning В burchagi A burchagidan 1,5 marta katta, С burchagi esa, B burchagidan katta. В burchakni toping.
II variant
1. АОК burchak ga teng. , ОM - AОK burchakning bissektrisasi . CОМ burchakni toping.
2. АВС tengyonli uchburchakning perimetri 28 sm; AC uchburchakning asosi, BD esa balandligi, DBC uchburchakning perimetri 18 sm. BD ni toping.
3. СDE uchburchakning D burchagi C burchagian 2,5 marta katta, E burchagi esa, D burchagidan kam. E burchakni toping.