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# Centroids of Plane Areas

## Square, rectangle, cirle. semi-circle and right-angled triangle

The centroid of an area is the point where the whole area is considered to be concentrated.

### Square

#### Distance

x = a / 2              (1a)

y = a / 2              (1b)

#### Area

A = a2              (1c)

### Rectangle

#### Distance

x = a / 2              (2a)

y = b / 2              (2b)

#### Area

A = a b              (2c)

### Circle

#### Distance

x = r              (3a)

y = r              (3b)

#### Area

A = π r2              (3c)

### Semi-Circle

#### Distance

x = 4 r / (3 π)             (4a)

y = r              (4b)

#### Area

A = π r2/ 2            (4c)

### Right-angled Triangle

#### Distance

x = b / 3              (5a)

y = h / 2              (5b)

#### Area

A = b h / 2             (5c)

## Related Topics

• Mathematics - Mathematical rules and laws - numbers, areas, volumes, exponents, trigonometric functions and more

## Tag Search

• en: centroid areas square rectangle semi circl right angled triangle

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## Citation

• Engineering ToolBox, (2019). Centroids of Plane Areas. [online] Available at: https://www.engineeringtoolbox.com/centroids-areas-d_2174.html [Accessed Day Mo. Year].

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