# What is the perimeter of a triangle with corners at #(7 ,5 )#, #(1 ,2 )#, and #(4 ,8 )#?

##### 2 Answers

**Perimeter of the triangle is** **unit.**

#### Explanation:

The vertices of the triangle are

Perimeter of the triangle is

Perimeter of the triangle is

#### Explanation:

To find the perimeter, you need to find the distance of each side and add them up right?

So first you need to figure out the length of each side, and you can do this by plotting the corner points and assigning vectors to each side.

When you plot the points, it should look something like this:

To find a vector

Hence to calculate the vectors between

Then the length of each vector needs to be calculated. To calculate the length of vector

You can use:

Hence when we are calculating the distances of the vectors of the triangle:

Therefore the total perimeter is