, 
, 
- sides of a triangle
- semiperimeter
Heron's formula for calculating the Area of a triangle if given all sides ( A ) :
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Area of a triangle using sides, Heron's formula
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Written by Administrator
Area of plane shapes
- Area of a triangle
- Area of a right triangle
- Heron's formula for area
- Area of an isosceles triangle
- Area of an equilateral triangle
- Area of a triangle - "side angle side" (SAS) method
- Area of a triangle - "side and two angles" (AAS or ASA) method
- Area of a square
- Area of a rectangle
- Area of a parallelogram
- Area of a rhombus
- Area of a trapezoid
- Area of an isosceles trapezoid
- Area of a regular polygon
- Area of a circle
- Area of a sector of a circle
- Area of a circular segment
- Area of an annulus
- Area of a sector of an annulus
- Area of an ellipse
- All formulas for area of plane figures