Edexcel IGCSE Maths 复习笔记 4.11.1 Area - Formulae

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-dimensional shapes and space
  • Some of the uses of area are a little more obvious than some areas of maths
  • Examples include working out the area of a floor if laying or purchasing a new carpet or the amount of land needed if designing a sports field

 

Area – using formulae

  • There are some basic formulae you should know and be comfortable using
  • Be aware that some area formulae use distances that aren’t necessarily one of the sides of the shape
  • Make sure you know what the different letters in each formula are referring to

 

 

  • These formulae are essential – anything more complicated will be given in the exam:

Area-Formulae-2D

 

Exam Tip

You may have to do some work to find the lengths first – using Pythagoras Theorem, Trigonometry (SOHCAHTOA) etc. so make sure you look out for that!

Worked Example

Area-%E2%80%93-Formulae-Example-1Annotated-Parallelogram-1

Worked Example

Area-%E2%80%93-Formulae-Example-two

转载自savemyexam

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