Know the basic properties of isosceles, equilateral and right-angled triangles.
Give geometrical reasons to justify these properties.
Use these facts to find lengths and angles in rectilinear figures and in simple proofs.
Use these facts in more formal proofs of geometrical results, for example circle theorems.
Know the basic properties of the square, rectangle, parallelogram, trapezium, kite and rhombus.
Give geometrical reasons to justify these properties.
Use these facts to find lengths and angles in rectilinear figures and in simple proofs.
Use these facts in more formal proofs of geometrical results, for example circle theorems.
Identify reflection and rotation symmetries of triangles, quadrilaterals and other polygons.