Question

if ac = 23 and bc = 19, find ab.

Explanation:

Step1: Identify segment - length relationship

From the line - segment diagram, we know that $AC=AB + BC$.

Step2: Solve for AB

We can rewrite the formula as $AB=AC - BC$. Substitute $AC = 23$ and $BC = 19$ into the formula. So, $AB=23−19$.

Step3: Calculate the result

$AB = 4$.

Answer:

4