ANSWER:
5
STEP-BY-STEP EXPLANATION:
The figure ABCD is a parallelogram so AC and BD are bisected, which means that AE = EC are equal, therefore, we can determine the value of AE like this:
[tex]\begin{gathered} AC=AE+EC \\ AE=EC \\ AC=2AE \\ AE=\frac{AC}{2} \\ \text{ replacing} \\ AE=\frac{10}{2} \\ AE=5 \end{gathered}[/tex]
Therefore, the answer is a. 5
