Answer :
Answer:
15
Step-by-step explanation:
The segment addition postulate states that if AC is a line with point B, then AB + CD must equal AC.
Setting Up the Equation
Using the postulate above we can set up an equation that is set equal to BD.
- BC + CD = BD
Now, rewrite this using the information we are given in the question.
- BC + 2 = 17
Solving For BC
Now, we can solve this equation using the properties of equality.
- BC + 2 = 17
To solve you need to isolate BC. Do this by subtracting 2 from both sides.
- BC = 15
This gives us the answer, 15.