GCSE Maths
Geometry
revision.
Pythagoras, trigonometry, circle theorems and the diagrams that earn method marks when they are labelled first.
Geometry guides
Pick the text.
Build the argument.
01
Trigonometry
Use SOHCAHTOA on right-angled triangles: label opposite, adjacent and hypotenuse from the angle, then choose sine, cosine or tangent.
Start revising 02Pythagoras
Use a² + b² = c² on right-angled triangles to find a missing side, including in 3D and in reverse to test for a right angle.
Start revising 03Circle theorems
Use the GCSE circle theorems with reasons: angle in a semicircle, centre and circumference, cyclic quadrilaterals, tangents and the alternate segment.
Start revisingKeep going
More GCSE Maths
in the same style.
GCSE Maths revision that treats method as the mark scheme: fractions, ratio, algebra, graphs, trigonometry, Pythagoras, circle theorems and probability, with working shown line by line.
All Maths revision