Edexcel IGCSE Maths 复习笔记 4.14.1 Problem Solving with Areas What is problem solving? Problem solving, as far as GCSE Mathematics is concerned, usually has two key features: A question is given a...
Edexcel IGCSE Maths 复习笔记 4.13.1 Circles - Sector Areas & Arc Lengths What is a sector? What is an arc? A maths book will (correctly) tell you that an arc is part of the circumference of a c...
Edexcel IGCSE Maths 复习笔记 4.12.1 Circles - Area & Circumference Why are circles different to other 2D shapes? Circles just have their own language! The circumference of a circle is its perim...
Edexcel IGCSE Maths 复习笔记 4.11.2 Area - Adding & Subtracting What do we mean by an awkward shape (a compund shape)? Sometimes the shape we want to find the area of isn’t one of the standard ...
Edexcel IGCSE Maths 复习笔记 4.11.1 Area - Formulae What is area and why do we need to calculate it? Area is the amount of space taken up by a two-dimensional shape Volume deals with three-dimensio...
Edexcel IGCSE Maths 复习笔记 4.10.2 Sine & Cosine Rules, Area of Triangle - Harder Choosing which rule or formula to use It is important to be able to decide which Rule or Formula to use to ans...
Edexcel IGCSE Maths 复习笔记 4.10.1 Sine & Cosine Rules, Area of a Triangle - Basics What are the sine & cosine rules, & the area of a triangle formula? Remember, Pythagoras and SOHCAHT...
Edexcel IGCSE Maths 复习笔记 4.9.2 3D Pythagoras & SOHCAHTOA What are Pythagoras & SOHCAHTOA? Pythagoras’ Theorem helps us find missing side lengths of a right-angled triangle It is also fr...
Edexcel IGCSE Maths 复习笔记 4.9.1 SOHCAHTOA What is SOHCAHTOA? SOHCAHTOA is a mnemonic – ie a way to remember the 3 important formulas for sin (sine), cos (cosine), and tan (tangent) In a right-an...
