Question:
Find the length of each side of a rhombus whose diagonals are 24 cm and 10 cm long.
Solution:
Let ABCD be the rhombus with diagonals AC and BD intersecting each other at O.
We know that the diagonals of a rhombus bisect each other at right angles.
Applying Pythagoras theorem in right-angled triangle AOB, we get:
$A B^{2}=A O^{2}+B O^{2}=12^{2}+5^{2}=144+25=169$
$A B=13 \mathrm{~cm}$
Hence, the length of each side of the given rhombus is 13 cm.