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The perimeter of parallelogram ABCD is equal to 10 cm. Find the length of diagonal BD if you know that the perimeter of △ABD is 8 cm.
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The perimeter of parallelogram ABCD is equal to 10 cm. Find the length of diagonal BD if you know that the perimeter of △ABD is 8 cm.

User Yorian
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2a+2b=10, a+b=5
a+b+d(diagonal)=8, 5+d=8, d=3(diagonal BD=3)
User Ankur Singh
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