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Find the area of a quadrilateral `A B C D` in which `A B=42 m ,B C=21c m ,C D=29 c m ,D A=34 c m` and diagonal `B D=20 c mdot`

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RD SHARMA ENGLISH-HERON'S FORMULA-All Questions
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  3. Find the area of a quadrilateral A B C D in which A B=42 m ,B C=21c m ...

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  17. If each side of a triangle is doubled, then find percentage increas...

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