4.2 Excercises- Angle Theorems
1. Outer Angles
  How big it the angle x?
  Λx =  
2. Supplementary Angles

How big are the triangle’s angles?

a) Λc =
b) Λa =
c) Λb =
3. Top Triangles
  In the triangle ABC, the segment DE is parallel to the segment  BC.  How big are the angles C and D?
a) ΛC =
b) ΛD =