an angle is formed when two lines intersect at a point called the vertex. problems with angles often involve triangles, other polygons, parallel lines and circles.

Key Skills

  • identify and name different types of angles.
  • know the angle properties associated with parallel lines.
  • know angle properties relating to triangles, quadrilaterals, lines and points.
  • solve problems involving the above properties.


vertexdegreeminute, complementary angles, supplementary angles, adjacent anglesacute angle, right angle, obtuse angle, reflex angle, congruent, vertically oppositetransversalcorresponding anglesalternate angles, co-interior angles.