(a) Use vectors to show that A 2 , − 1 , 1 , B 3 , 2 , − 1 , and C 7 , 0 , − 2 are vertices of a right tringle. At which vertex is the right angle? (b) Use vector to find the interior angles of the tringle with vertices − 1 , 0 , 2 , − 1 , and 1 , 4 . Express your answer to the nearest degree.
(a) Use vectors to show that A 2 , − 1 , 1 , B 3 , 2 , − 1 , and C 7 , 0 , − 2 are vertices of a right tringle. At which vertex is the right angle? (b) Use vector to find the interior angles of the tringle with vertices − 1 , 0 , 2 , − 1 , and 1 , 4 . Express your answer to the nearest degree.
(a) Use vectors to show that
A
2
,
−
1
,
1
,
B
3
,
2
,
−
1
,
and
C
7
,
0
,
−
2
are vertices of a right
tringle. At which vertex is the right angle?
(b) Use vector to find the interior angles of the tringle with vertices
−
1
,
0
,
2
,
−
1
,
and
1
,
4
.
Express your answer to the nearest degree.
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
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