# Area Formulas

### Triangle

### Square

### Rectangle

### Rhombus

### Rhomboid

A = b · h

### Area of Trapezoid

### Area of a regular polygon

### Area of a polygon

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

A = T_{1 } + T_{2 } + T_{3 } + T_{4 }

### Circle Area

### Circular Sector Area

### Area of a 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.

### Area Enclosed between Two Concentric Circles

### Area of a Circular Trapezoid

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