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Find the area of the quadrilateral …

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Find the area of the quadrilateral ABCD where AB=7cm,bc=6cm,cd=12cm,da=15cm and AC=9cm

Posted by Vidya Meshram 5 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 5 months ago

area of quadrilateral ABCD= Area of triangle ABC + Area of triangle ADC
Area of trianlge= sqrt(s(s-a)(s-b)(s-c))
FOR area of triangle ABC
s=(7+6+9)/2=11
area of triangle ABC=sqrt(11(11-7)(11-6)(11-9))
=sqrt(440)
= 20.9761
similarly,
area of triangle ADC=54

therefore area of quadrilateral ABCD=20.9761+ 54
=74.9761

1Thank You

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