The best replacement for angles is saxons.

The best alternatives to angles are rated as following:
★★★★★  saxons
★★★★★  angels
★★★  sides
★  right triangle
★  slopes
★  congruent angles
★  quaternions
★  yankees
  triangle has four sides
  complementary
  vertices
  supplementary angles
  radians
  complementary angles
  similar angles

Your alternative for angles is not listed? Suggest!
Speaking about angles, one probably shouldn't forget about protractor.

Other search terms related to angles and their ratings are:
★★★★★ protractor
★★★ transversal
★ triangles
★ circles
★ using a protractor
protractors
parallel and intersecting lines
You have in mind a companion for angles and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of angles in all years. Click on graph for more.
angles
saxons
angels