# Math Help - Circle geometry.

1. ## Circle geometry.

what have you tried?

I have tried both the first is 15/4?

the second one is 270?

Originally Posted by zokura
I have tried both the first is 15/4?
No. The first is $3(X+3)=4(4+5)$
That is the secant/chord theorem.

So x =9? for #1 Thank you.

Is number 2 correct?