Roots of Reason
Roots of Reason
rootsofreason.org
does it fold onto itself?
Anchor Chart · Grade 4 · 4.G.A.3

Lines of Symmetry

Fold along the line. If the two parts land on each other, the line is one.
1Fold It. The Parts Must Match.
foldhalves match
A line of symmetry folds the figure onto itself.
2Count Every Direction
a square holds four
Two folds run across. Two run corner to corner.
3Same Distance Is Not Enough
matchesdoes not match
Both points sit the same distance from the line.
The join must cross it at a square corner.
4How Many Each Figure Holds
2rectangle3equilateralendlesscircle
Count every direction before you write a number.