Geometry - Main Topics Covered The CSEC Mathematics syllabus - CSEC Mathematics exam
 
 Here’s a clear and student-friendly lesson on  Geometry  for CSEC Additional Mathematics, covering:         📐  1. Angles   🔹  Types of Angles:     Acute :      less than 90°   Right :      exactly 90°   Obtuse :      between 90° and 180°   Straight :      exactly 180°   Reflex :      more than 180°    🔹  Angle Rules:     Angles      on a straight line = 180°   Angles      around a point = 360°   Vertically      opposite angles are equal   Alternate      angles (Z-shape) are equal   Corresponding      angles (F-shape) are equal   Co-interior      angles (C-shape) add to 180°    Example:  If one angle on a straight line is 120°, the other is:  180°−120°=60°180°−120°=60°         🔺  2. Triangles   🔹  Types of Triangles:     Equilateral :      all sides and angles equal (60° each)   Isosceles :      two sides and two angles equal   Scalene :      all sides and angles different   Right-angled :      one angle is 90°    🔹  Triangle Angle Rule:   Sum of interior ...
 
 
 
 
