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25 votes
25 votes
In the figure below, C is between A and D, and B is the midpoint of AC. If BC=5 and AD = 18, find CD.

CD =
B
D
X
G

In the figure below, C is between A and D, and B is the midpoint of AC. If BC=5 and-example-1
User KevInSol
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1 Answer

12 votes
12 votes

A midpoint is a point that divides a line into 2 equal smaller lines.

Therefore, given that B is the midpoint of AC, AB = BC.

BC = 5 -> AB = 5.
So, AC = 5 + 5 = 10.

We're given AD = 18, and AD is also equal to AC + CD.
AC = 10, therefore CD = 18 - 10 = 8.

User Voodooattack
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