Geometry (Edexcel GCSE Maths): Flashcards

$180°$

$a + b + c = 180°$

$180°$

$360°$

$a + b + c + d = 360°$

Splits into 2 triangles: $180° + 180° = 360°$

$360°$ (complete rotation)

Exterior angle = sum of 2 opposite interior angles

$a + b = d$ where $d$ is exterior angle

Two sides of equal length

Two equal angles opposite the equal sides

Squares, rectangles, parallelograms, trapeziums