Quadrilateral has diagonal

MATHEMATICS · Subjective · CBSE · Mathematics · Heron's Formula · Heron's Formula

Problem

Quadrilateral ABCDABCD has diagonal AC=9 cmAC = 9\,\text{cm}. In △ABC\triangle ABC, the perpendicular distance from BB to ACAC is 6 cm6\,\text{cm}. In △ADC\triangle ADC, the sides are AD=8 cmAD = 8\,\text{cm} and DC=7 cmDC = 7\,\text{cm}. Determine the area of ABCDABCD to one decimal place.

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