Find the length of `OA.`

In the following figure: OA = 2 cm " " = AB = 2BC = (1)/(2) CD = (1)/(6) DE Find the length of OE.

In the given figure,O is the centre of a circle such that OA=5cm,AB=8cm and OD perp AB meeting AB at C. Find the length of CD.

O is an internal point of the rectangle ABCD such that OB = 6 cm,OD =8 cm and OA =sqrt( 19)cm . Then find the length of OC.

O is any point inside the rectangle ABCD. If OB = 6cm, OD = 8cm and OA = 5cm, then find the length of OC.

O is any point inside a rectangle ABCD. Prove that OB^(2)+OD^(2)=OA^(2)+OC^(2) . DEDUCTION In the given figure, O is a point inside a rectangle ABCD such that OB=6cm, OD=8 cm and OA=5 cm, find the length of OC.

In the following figure, AD is a straight line. OP bot AD and O is the centre of both the circles. If OA = 34 cm, OB = 20 cm and OP = 16 cm, find the length of AB.

Find the length of the are OA of the curve y= a "ln" (a^(2))/(a^(2)-x^(2)) , where O(0, 0), A ((a)/(2), a "ln" (4)/(3))

Let O be the origitn and point A be represented by z. If OA is rotated throught an angle po//2 in the anticlockwise direction keeping the length of OA same, then what represents the new point ?

If OA=12 cm, then find the length of PQ (in cm), where O is the centre of circle.