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Area
,→Key Stage 3
<math>a = \pi r^2</math>
==Key Stage 4==
===Meaning===
[[Area]] is the size of a surface.
===About Area===
: The [[unit]]s of [[area]] are [[Metres Squared|metres squared]] or [[Centimetres Squared|centimetres squared]].
===Equations===
====Area of a Rectangle====
<math>area = base \times height</math>
<math>a = b\times h</math>
====Area of a Triangle====
<math>area = \frac{1}{2} \times base \times height</math>
<math>a = \frac{b \times h}{2}</math>
====Area of a Trapezium====
<math>area = \frac{1}{2} \times (shortside+longside) \times height</math>
<math>a = \frac{1}{2} \times (A+B) \times height</math>
====Area of a Circle====
<math>area = \pi \times (radius)^2</math>
<math>a = \pi r^2</math>
====Surface Area of a Sphere====
<math>area = 4 \times \pi \times (radius)^2</math>
<math>a = 4 \pi r^2</math>
====Surface Area of a Cylinder====
<math>area = 2 \times \pi \times (radius)^2</math> + 2 \times \pi \times radius \times height
<math>a = 2 \pi r^2 + 2 \pi rh</math>