For the answer to the question above, I'll show my solution on how you can solve your problem. AC² + BC² = AB² <span>5² + 12² = AB² </span> <span>25 + 144 = AB² </span> <span>169 = AB² </span> <span>13 = AB </span>
<span>Triangle ABC is proportional to triangle ADB. </span>
<span><u>AC </u>= <u>AB </u></span> <span>AB AD </span>
<span><u>5</u> = <u>13 </u></span> <span>13 AD </span>
