Math, asked by sreeram76, 3 months ago

using herons formula help me with this

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Answered by pratyakshgoel2

1

Answer:

√21(21-15)(21-14)(21-13)

=√21X6X7X8

=√7X3X2X3X7X2X2X2

=√7²X3²X2⁴

=7X3X4

=21X4 cm²

=84 cm²

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