If the Lengths of Three Sides of a Triangle Are

question 50

Short Answer

If the lengths of three sides of a triangle are known, then the following formula, known as Hero's (or Heron's) formula is sometimes used:
​ ​​where a, b, and c are the given lengths of the sides, and . Use this formula to find the area of a triangle with the lengths given below (correct to the nearest square foot).
​ , , and ​
__________ ft²

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Definitions:

Tracheids

Long, thin cells in plants that facilitate the transport of water and minerals upwards from the roots.

Vessel Elements

Components of the xylem tissue in plants, which are elongated cells that contribute to the conduction of water and minerals.

Xylem

The vascular tissue in plants responsible for the transport of water and nutrients from the roots to the rest of the plant.