ASPECTS OF NUMERACY FOCUS AREA 3 APPLYING CONCEPTS OF ANGLES AND GEOMETRY early in STAGE 5 Identifies similar figures and describes their properties informally Uses scale factors and proportion statements to determine unknown lengths in similar figures Uses scales on maps, plans and drawings end of STAGE 5 Uses deductive reasoning with congruent triangles Verifies properties of isosceles and equilateral triangles and special quadrilaterals using congruent triangles Uses conditions for triangles to be similar Uses results for the sum of exterior and interior angles in polygons Print