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Perimeter and Area

Topic: Geometry

Perimeter and Area

a. Perimeter – Distance around a shape

Shape	Formula
Square	$\text{side}$
Rectangle	$2 \times (l + b)$
Triangle	$a + b + c$
Circle	$2 π r$ or $π d$

b. Area – Space inside a shape

Shape	Formula
Square	$side2\text{side}^2$
Rectangle	$l \times b$
Triangle	$12×b×h\frac{1}{2} × b × h$
Circle	$πr^2$
Trapezium	$12(a+b)h\frac{1}{2}(a + b)h$

Geometry

Basic Mathematics

What is Geometry? Basic Geometrical Terms Types of Angles Types of Triangles Quadrilaterals (4-sided shapes) Perimeter and Area Area – Space inside a shape 3D Shapes and Volume Lines and Angles Properties Circle Geometry Pythagoras Theorem Geometrical Constructions (Basics) Coordinate Geometry (Basics) Symmetry and Transformations Summary Table