This week, I learned how to use a calculator to calculate missing angles and side lengths on a triangle!

Example: Solve the right triangle!

Using a calculator, we can find this angle! First, find the missing side length! We can use the pythagorean theorem to find this:

The Value Rounds to 9.3!

 

Next we will find the value of angle

First we will find the sides: Opposite, Adjacent and Tangent:

We now have three options on which calculator function we will use:

1. SIN( )
2. COS( )
3. TAN( )

I’m going to use SIN! IMPORTANT: Make sure your calculator is set to degrees!

Now, we enter in the equation like this (You can either use SIN or aSIN):

That means angle is

Finally we need to find the other angle! Since we already have the right angle and another angle. This will be easy all you have to do is subtract 34 from 90. This will give us

Now that we have solved the triangle! It looks like this: