The lengths of two sides of a parallelogram are 3 cm...

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The lengths of two sides of a parallelogram are 3 cm and 10 cm. What is the sum of the squares of the diagonals of the parallelogram?

A. 218 cm²

B. 109 cm²

C. 169 cm²

D. 206 cm²

Answer: Option A

AC² + BD² = 2(AB² + BC²)
AC² + BD² = 2(10² + 3²) = 218

This Question Belongs to Arithmetic Ability >> Geometry

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