VECTORI

VECTORI

9th Grade

6 Qs

quiz-placeholder

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VECTORI

VECTORI

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Hard

Created by

Mihaela Anusca

Used 37+ times

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6 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

Vectorii coliniari....

au acelasi sens

au acelasi modul

au coordonatele respectiv proportionale

au aceeasi directie

2.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

Adunarea vectorilor se realizeaza prin

regula poligonului

regula trapezului

regula paralelogramului

regula unghiului

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Fie triunghiul ABC si M mijlocul segmentului BC. Atunci au loc relațiile:

 AM =12(AC+AB)\overrightarrow{AM}\ =\frac{1}{2}\left(\overrightarrow{AC}+\overrightarrow{AB}\right)  

 AM =13(AC+AB)\overrightarrow{AM}\ =\frac{1}{3}\left(\overrightarrow{AC}+\overrightarrow{AB}\right)  

 xM=xA+xC2        yM=yA+yC2x_M=\frac{x_A+x_C}{2}\ \ \ \ \ \ \ \ y_M=\frac{y_A+y_C}{2}  

 xM=xB+xC2        yM=yB+yC2x_M=\frac{x_B+x_C}{2}\ \ \ \ \ \ \ \ y_M=\frac{y_B+y_C}{2}  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Fie triunghiul ABC si G centrul de greutate al acestuia. Determinati valoarea sumei

 AG+BG+CG\overrightarrow{AG}+\overrightarrow{BG}+\overrightarrow{CG}  

 23(AB+AC+BC)\text{}\frac{2}{3}\left(\overrightarrow{AB}+\overrightarrow{AC}+\overrightarrow{BC}\right)  

 0\overrightarrow{0}  

 12(AB+AC+BC)\frac{1}{2}\left(\overrightarrow{AB}+\overrightarrow{AC}+\overrightarrow{BC}\right)  

0

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Fie A(2,4) , B( 3, 5), C(-1,4). 

Coordonatele vectorului    AB+AC\overrightarrow{AB}+\overrightarrow{AC}   sunt:

(3, 5)

(-1,2)

(1, -2)

(-2, 1)

6.

MULTIPLE SELECT QUESTION

5 mins • 1 pt

Fie punctele A(1,3), B(2,4) C(6,8) și D(-2,-4). Următorii vectori sunt coliniari cu vectorul  AB\overrightarrow{AB}  

CB\overrightarrow{CB}

DA\overrightarrow{DA}

3BC\overrightarrow{3BC}

CD\overrightarrow{CD}

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