area of a Heron's formula |
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\( A \;=\; \sqrt { s\cdot (s-a) \cdot (s-b) \cdot (s-c) } \) \( s \;\equiv\; \dfrac{1}{2} \cdot (a+b+c) \) (Semiperimeter) |
- When given three sides of a triangle \(\; a,\ b, \ c\).
- Semiperimeter is one half of the perimeter.
Perimeter of a Heron's formula |
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\( p \;=\; a+b+c \) \( s \;\equiv\; \dfrac{1}{2}\cdot p \) (Semiperimeter) |