If ABCD is a parallelogram then, what are the sides of the parallelogram?

  1. 10 units and 15 units
  2. 8 units and 15 units
  3. 10 units and 12 units
  4. 8 units and 14 units

Answer (Detailed Solution Below)

Option 2 : 8 units and 15 units
Free
REET CT 1: CDP (Growth and Development)
10 Qs. 10 Marks 8 Mins

Detailed Solution

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Concept used:

The opposite sides of the parallelogram are equal

Calculation:

Now,

2x + 5 = 2y + 1

⇒ 2y - 2x = 5 - 1

⇒ 2(y - x) = 4

⇒ y - x = 2      ----(1)

And, 2y - 6 = x + 3

⇒ 2y - x = 3 + 6 

⇒ 2y - x = 9      ----(2)

Subtracting eq(1) from eq(2)

2y - x - y + x = 9 - 2

⇒ y = 7

From eq (1),

x = 5

Side of the parallelogram = 2x + 5 = 2 × 5 + 5 = 15

And, x + 3 = 5 + 3 = 8

∴ The side of the parallelogram are 15 units and 8 units

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