1. In quadrilateral ABCD, AB = 9 cm, BC = 13 cm,
CD = 14 cm, DA = 12 cm and BD = 15 cm. Find
the area of quadrilateral ABCD.
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Answer:
Step-by-step explanation:
Area of Quadrilateral = Area of triangle 1 . + Area of triangle 2 .
Area of triangle 1 . = whole root 21 (21-15)(21-13)(21-14)
= whole root 21 (6)(8)(7)
=whole root 7056
=84
Area of triangle 2. = whole root 18 (18-15)(18-9)(18-12)
= whole root 18 (6)(3)(9)
=whole root 2916 = 54
Area of Quadrilateral = 54 + 84 = 138 Ans ....
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