Question

Please help me with the last one on number 2

Answer 1

`OB=\sqrt[]{3^2+4^2}=5`
`OC=\sqrt[]{4^2+3^3}=5`
`OD=\sqrt[]{2^2+\sqrt[]{21}^2}=5`

Step-by-step explanation:

The length of the lines mentioned can be found using the distance formula

which says

`length=\sqrt[]{(x_1-x_0)^2+(y_1-y_0)^2}`

where (x0,y0) and (x1,y1) are any two points.

Now in our case one fixed point is the centre of the circle and so w