The lengths of two sides of a parallelogram are 6 cm and 20 cm. What is the sum of the squares of the diagonals of the parallelogram (in cm2 )?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 872.
Sum of the squares of the diagonals of a parallelogram = 2 × (a² + b²) = 2 × (6² + 20²)
(36 + 400) × 2 = 436 × 2 = 872