4. Find the area of a rhombus whose side is 6.5 cm and altitude is 5 cm. If one of its
diagonal is 13 cm long, find the length of other diagonal.
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Answer:
Side of Rhombus = 6.5
Area of Rhombus = side x side
= 6.5x6.5
= 42.25cm²
Diagonal = 13 cm
Area of Rhombus = 1/2 x d1 x d2
42.25. 1/2 x 13 x d2
42.25 = 13/2 x d2
d2 = 42.25 x 2/13
d2 = 84.5 / 13
d2 = 6.5 cm
Area of rhombus is 42.25cm²
Other diagonal is 6.5 cm
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