# How do you find the exact value of the third side given #triangle PQR#, p=6, #q=sqrt2# and #mangleR=pi/4#?

##### 1 Answer

Dec 23, 2016

#### Explanation:

We can find the value of third side if two sides and measure of included angle between them is given. We use **Law of cosines** for this, according to which if two sides

Here, we are given

Hence,

=

Hence