Question

in the figure below, b is between a and c, and c is between b and d. if bd = 11, ac = 13, and bc = 7, find ad.
ad =

Explanation:

Step1: Find AB

Since $AC = AB+BC$ and $AC = 13$, $BC = 7$, then $AB=AC - BC$. So $AB=13 - 7=6$.

Step2: Find AD

Since $AD=AB + BD$ and $AB = 6$, $BD = 11$, then $AD=6 + 11=17$.

Answer:

17