IP AMaths Notes (Upper Sec, Year 3-4): 08) Plane Geometry with Algebra

Q: What does IP AMaths Notes (Upper Sec, Year 3-4): 08) Plane Geometry with Algebra cover?
A: Combine coordinate geometry, similarity, and circle theorems to chase angles and lengths in IP AMaths.

Upper-sec paper setters mix Euclidean geometry with algebraic coordinates. Treat every diagram as an algebra system: assign variables, write equations, then solve.

Keep the full topic roadmap handy via our IP Maths tuition hub so you can jump into related drills, quizzes, or diagnostics as you move through these notes.

Key reminders

• Interior angles of a triangle sum to $\pu{\pi \space rad}$ ($\pu{180 ^\circ}$).
• Circle theorems still apply with coordinates: equal chords subtend equal angles, angle at centre is twice the angle at circumference, cyclic quadrilaterals have opposite angles summing to $\pi$