Answer:
Simplifying the expression
we get 
Step-by-step explanation:
We need to simplify the expression 
Solving:

Applying exponent rule: 

Factors of 
Factors of 
Replacing terms with factors

Using exponent rule: 

Using exponent rule: 

Now using exponent rule: 

So, simplifying the expression
we get 
you can measure the first angle with a protractor and then measure the other one see if there is a different angle
4, 8, 12, 16, 20, 24, 28, 32, 36, 40
Hope this helps! ^_^