2010 · Q64
In the figure given above (AB parallel to LM, with angles b, c and reflex angle a), what is angle a equal to ?
[Figure: two horizontal parallel lines AB (top) and LM (bottom), with a polygonal line forming angles b, c and reflex angle a]
Elementary MathematicsGeometry
- Aπ + b + c
- B2π – b + c
- C2π – b – c
- D2π + b – c
Explanation
Angle chase with AB∥LM gives a=2π-b-c.