Quadrilateral ABCD are AB=13cm,BC=16,CD=20cm,BD=12 cm. Find its area using heron's formula.
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area of quadrilateral abcd= 55.425625cm^2(approximately)
Jackbin:
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area of triangle BCD=√s(s-a)(s-b)(s-c) ,where s =a+b+c=/2. s=12+16+20/2 =24 . √24(24-12)(24-16)(24-20)=√768. area of triangle BCD=√786.area of triangle abd=area of triangle .area of quadrilateral =√786+√786=55.4256(approximately)
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