$\"\"$

\

The sum of the angles in any triangle is $\"\"$ .

\

The length of side is $\"\"$ .

\

The two angles are $\"\"$ and $\"\"$ .

\

The remaining angle $\"\"$ .

\

$\"\"$ .

\

Law of sines : $\"\"$ .

\

Substitute $\"\"$ , $\"\"$ and $\"\"$ in the above equation

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

Law of sines : $\"\"$ .

\

Substitute $\"\"$ , $\"\"$ and $\"\"$ in the above equation.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ , $\"\"$ and $\"\"$ .