Question

Please solve
I know the answer but i wanna confirm....

Answer 1

first find AC using Pythagoras theorem them Ac=Ab then in triangle AOB you have OA AB and with pytha again you'll get answer

Answer 2

Answer:

Step-by-step explanation: C is the mid-point on AB, so that AC = BC

Now the mid-point of the hypotenuse of a right triangle is equidistant from the vertices.

Therefore, AC = BC = OC

hence, AC = BC = 6.5cm [since, OC = 6.5cm]

Now, AB = AC + BC = 6.5 + 6.5 = 13cm

ab =13 cm

oa = 12 cm

ob^2 = ab^2 - oa^2

         =  13^2 - 12^2

          = 169 -144

          =25

    ob= square root of 25= 5 cm