NECTA Form 1–4 (CSEE) · Form 1 · Basic Mathematics (Form 1) · Notes · Unit 5: Elementary Geometry, Angle Properties and Polygons

Unit 5: Elementary Geometry, Angle Properties and Polygons

Comprehensive NECTA Form 1 Basic Mathematics revision notes covering fundamental geometric elements (points, lines, rays, segments, planes), angle classification (acute, right, obtuse, straight, reflex, revolution), angle pairs (complementary, supplementary, vertically opposite, adjacent), transversal and parallel line theorems (alternate, corresponding, co-interior angles), triangle angle sum and exterior angle theorems, polygons (interior sum (n-2)*180, exterior sum 360, regular polygons and finding side count n), quadrilateral properties and symmetries, and straightedge/compass constructions with complete NECTA practice problems and marking schemes.