Question

Help me on number 15 please

Answer 1

the real answer is
you have to ignore the lines yz and yt but u labeled the rest correct so what u have there is correct just try to figure it out from there

Answer 2

You've already correctly labeled everything you need.

-- Ignore the lines YZ and YT .

-- That leaves you with the right triangle XYW .

-- Its legs are 8 and (12+3) = 15 .

-- XY is its hypotenuse.

I'm SURE you can finish it off from here.