Mathematics
Grade9
Easy

Question

Direction : Among given options only for this figure perpendicular bisector theorem is used.

If DC = 4 units, Find AD.

  1. 8 space square root of 2
  2. 4 space square root of 2
  3. 8
  4. 16

Hint:

Pythagoras theorem states that “In a right-angled triangle, the square of the hypotenuse side is equal to the sum of squares of the other two sides“. T

The correct answer is: 8 space square root of 2


    From ADC triangle, we apply Pythagorean theorem
    AB = AC = 12
    DC = 4
    AD = square root of 12 squared minus 4 squared end root
    square root of 128
    8 square root of 2

    h squared equals p squared plus b squared

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