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Answer:
The measurement of angle B is 135°
The measurement of angle A is 60°
The measurement of angle C is 75°
Step-by-step explanation:
Angle A is the same value of 60, Angle B is pretty much just 180 - 45, and so is angle C.
 
        
             
        
        
        
Answer:
See Below. 
Step-by-step explanation:
Problem 1)
We want to simplify: 

First, let's factor the denominators of each term. For the second term, we can use the difference of two squares. Hence: 

Now, create a common denominator. To do this, we can multiply the first term by (<em>a</em> + 1) and the second term by (<em>a</em> + 2). Hence: 

Add the fractions: 

Factor: 

Simplify: 

We can expand. Therefore: 

Problem 2)
We want to simplify: 

Again, let's create a common denominator. First, let's factor out a negative from the second term: 

Now to create a common denominator, we can multiply the first term by (<em>a</em> - <em>c</em>) and the second term by (<em>a</em> - <em>b</em>). Hence: 

Subtract the fractions: 

Distribute and simplify: 

Cancel. Hence: 
