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Angle Properties and Additive Decomposition

4th Grade · Math · Open Global Math

6 lessons

Goal

Solve additive angle decomposition problems involving adjacent angles, angles on straight lines, angles around a point, and vertically opposite angles.

6 lessons
0 of 6 done
  1. Adjacent Angles and Adding AnglesUp next
  2. Complementary Angles Summing to 90 DegreesNot started yet
  3. Angle Properties on Straight LinesNot started yet
  4. Angles Around a Point Summing to 360 DegreesYou are here
  5. Vertically Opposite Angles at Intersecting LinesNot started yet
  6. Multi-Step Angle Problems with AddingNot started yet
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Learning standards covered

GlobalOGM.5.G.2Open Global Math Standards 2026™ · 4th Grade

Recognize angles as geometric turns and circular arc cuts (where a full turn is 360° and 1° is 1/360 of a circle); measure and construct angles using a protractor and set square; classify angles as acute, right (90°), obtuse, straight (180°), reflex, and full revolution (360°); solve additive angle decomposition problems.