Angles In Circle - Angles Outside The Circle

                     Lesson 1

Problem:  

Given two tangents, a=310°, b= 174°, find x.

Solution    Angle formed outside = 1/2 difference of intercepted arcs

Step 1:       

Solution   < x = 1/2 (a – b)

Step 2:

Solution    Substituting the given values of a and b in formula above

Step 3:

< x = 1/2(260° - 174°)

< x = 1/2(136°)

< x = 68°

Solution    The answer is: 68^o

Step 4:          

                                                            Complete      

                                                           Try two practice problems:  

Do the following:

A.

Given a tangent and a secant, c= 66°, x=22°, find a

B.

Given two tangents, a=283°, b=133°, find x.

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