What is the best estimate of 17/33 ×11/20

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

10 points? me . its important ‼️‼️