Question

Acellus
D
13
5
A
B
С
CD = [?]
Enter the number that belongs in
the green box.
Enter
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Answer 1

Answer:

$CD = 13$

Step-by-step explanation:

Given

The attached triangle

Required

Find $CD$

From the question, we have:

$\angle CDB = \angle ADB$

$\angle ABD = \angle CBD$

Base on AAS theorem;

$CD = AD$

Hence:

$CD = 13$