Understanding different types of angles and that angles in a triangle sum to 180° can be helpful when classifying a triangle. Recognising line symmetry and rotational symmetry will also help.

b. Or “The points can cross the line of symmetry”. c. Students will gain an awareness of the property of equidistant. You might hear them say, “The point on one side of the line is the same distance ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of line symmetry and develop students' reasoning with properties of symmetry to develop an ...