Question

Perimeter of rhombus is 26 cm and length of one diagonal is 5 cm. Find other diagonal

Answer 1

we know diagonal cut 90degree at centre.
see in figure.
in AOB.
by pythogores theorem.
ab2=bo2+ao2
(6.5)2=(2.5)2+ao2
ao2=42.25-6.25
ao2=36
ao=6cm.
AC=ao+co
AC=6+6
AC=12cm.(other diagonal).
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