Ikki vektor orasidagi burchak va ularning skalar ko‘paytmasi — 9-sinf Geometriya test savollari

1.a(2;-1) va b(3;4) vektorlar orasidagi burchakni (yaqin butun darajaga) toping.

• A)≈60°
• B)≈45°
• C)≈100°
• D)≈80°

2.|a| = 3 sm, |b| = 7 sm, ular orasidagi burchak 120°. Skalar ko‘paytmani toping.

• A)21
• B)10,5
• C)-21
• D)-10,5

3.a(1;2) va b(3;4) vektorlarning skalar ko‘paytmasini toping.

• A)11
• B)7
• C)10
• D)14

4.a(3;4) va b(4;-3) vektorlarning skalar ko‘paytmasini toping.

• A)-12
• B)24
• C)12
• D)0

5.a(1;0) va b(1;1) vektorlar orasidagi burchakni toping.

• A)90°
• B)60°
• C)30°
• D)45°

6.|a| = 5 sm, |b| = 4 sm, ular orasidagi burchak 60°. Skalar ko‘paytmani toping.

• A)20
• B)10
• C)5
• D)-10

7.|a| = 6 sm, |b| = 8 sm, ular orasidagi burchak 90°. Skalar ko‘paytmani toping.

• A)-48
• B)0
• C)24
• D)48

8.|a| = 4 sm, |b| = 4 sm, ular qarama-qarshi yo‘nalgan (burchak 180°). Skalar ko‘paytmani toping.

• A)-8
• B)16
• C)-16
• D)0

9.a(4;3) vektorning uzunligini (modulini) toping.

• A)25
• B)3,5
• C)7
• D)5

10.a(5;12) vektorning uzunligini toping.

• A)7
• B)13
• C)17
• D)60