Asked by njeri
Given that OA = 2i + 3j and OB = 3i — 2j, find the magnitude of AB to one decimal place.
Answers
Answered by
oobleck
a•b = 0, so OA⊥OB
Just use the Pythagorean theorem. AB = √26
Just use the Pythagorean theorem. AB = √26
Answered by
mathhelper
Or, since you are showing that you work with vectors ....
vector AB = vector AO + vector OB
= <-2,-3> + <3,-2> = <1,-5>
|<1,-5>| = √26 = appr 5.1
vector AB = vector AO + vector OB
= <-2,-3> + <3,-2> = <1,-5>
|<1,-5>| = √26 = appr 5.1
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