# How do you find the inner product and state whether the vectors are perpendicular given #<7,2>*<0,-2>#?

##### 1 Answer

Jun 29, 2016

#### Answer:

they are not perpendicular

#### Explanation:

the inner or dot product in 2D is

here you have

they are **not perpendicular** as **the dot product is not zero**

to understand this, another definition of the dot prod is

if