Working with Angles
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Answer the following questions which deal with angles.  To see the correct answer, click on the box to the right of the question.

1.

What do you call an angle whose measure is 90º ? 
  



 

2.  

 

An acute angle is any angle whose measure is less than 180º.
(True or False)



 

3.

Angles 1 and 2 are adjacent angles.
(True or False)
 



 

4.

Two complementary angles measure x and 65º. 
How many degrees are there in x ?
     



 

5.

Two vertical angles measure x and 45º. 
How many degrees are there in x ?
          

  


 

6.

Two supplementary angles measure x and 75º.
How many degrees are there in x ?
   

 


 

7.

Two vertical angles measure 2x and 80º.
How many degrees are there in x ?
        

 



 

8.

Two complementary angles measure (2x+10) and (x+20) degrees.  What is the value of x ?
  



 

9.

Two supplementary angles measure (5x-30) and (x+90) degrees.  What is the value of x ?
                                                                       



 

10.  

An obtuse angle is any angle which measures between 90º and 180º.
 (True or False)