Use the Properties of Angle Measures to Find the Measure $( 15,20 )$

Multiple Choice

Use the properties of angle measures to find the measure of each marked angle.
- $( 15,20 )$ ; Find $\cos \theta$ .

A) $\frac { 4 } { 5 }$
B) $\frac { 4 } { 3 }$
C) $\frac { 3 } { 5 }$
D) $\frac { 3 } { 4 }$