SME
Grade 4 Math
Lines, angles, shapes and symmetry
The main lesson, then each kind of problem it solves.
Lines, angles, shapes and symmetry
Main lesson
Line symmetry
Use this for “How many lines of symmetry does the shape have?”
Classify triangles and quadrilaterals
Use this to sort triangles and four-sided shapes by right angles and parallel sides.
Lines, line segments and rays
Use this for “Is it a line, a line segment or a ray?”
Classify angles
Use this for “Is the angle acute, right or obtuse?”