Question

□ABCD is a parallelogram. Diagonals AC and BD intersect at point O. If OA = 7cm and OD = 3.5 cm, then find the lengths of its diagonals.​

Answer 1

∵ When diagonal AC and BD intersect each other at point o,

then OA = OC = (1/2) AC

And OB = OD = (1/2) BD

∴ OA = 1/2 × AC = 1/2 × 12 = 6 cm

and OB = 1/2 × BD = 1/2 × 9 = 4.5 cm

Answer 2

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