Heron’s Formula can also be used to find the area of a quadrilateral if:

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A You know the measure of all four angles.
B You know the length of four sides and one diagonal.
C The quadrilateral is a square.
D The perimeter is given.

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Answer: B. You know the length of four sides and one diagonal.

Explanation: By knowing a diagonal, you can split the quadrilateral into two triangles and apply Heron's Formula to each separately, then add the results.

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Heron’s Formula can also be used to find the area of a quadrilateral if:

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