Triangle

Equilateral Triangle Isosceles Triangle Scalene Triangle

Square

Rectangle

Rhombus

Rhomboid

P = 2 · (a + b)

A = b · h

Area of Trapezoid

Area of a Regular Polygon

n is the number of sides

Polygon

The area is obtained by triangulating the polygon and adding the area of these triangles.

A = T1 + T2 + T3 + T4

Circle

Circular Sector

Circular Segment

The circular area of the segment AB = Area of the circular sector AOB - Area of triangle AOB

Lune of Hippocrates

Area of the lune = area of the semicircle − area of circular segment.

 

Circular Trapezoid

Area enclosed between Two Concentric Circles

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Emma

I am passionate about travelling and currently live and work in Paris. I like to spend my time reading, gardening, running, learning languages and exploring new places.