Coordinates and vectors

Read the complete problem, then answer its numbered subtasks.

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Exercise 17

Book 2 · Coordinates and vectors

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Տրված են $() A 0; - 7$ , $(B 4;$ $) - 3$ , $() C - 5; - 3$ կետերը:

Subtask 1

Գտնել $B C$ հատվածի երկարությունը:

1

10

2

9

3

8

4

1

Subtask 2

Գտնել $B A$ վեկտորի կոորդինատները:

1

${4;$ $} 4$

2

${4;$ $} - 4$

3

${4;$ $} - 10$

4

${- 4;$ $} - 4$

Subtask 3

Գտնել $B A$ և $B C$ վեկտորների սկալյար արտադրյալը:

1

–36

2

30

3

36

4

$() 13; 4 - -$

Subtask 4

Գտնել $A B C$ անկյան մեծությունը:

1

60 $0$

2

45 $0$

3

30 $0$

4

$1 a r c c o s 3$

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