Answer:
BD = 10 m
Explanation:
Let's draw the figure from the given information.
When we draw the figure, we get two triangles.
ΔAOD and ΔBOD.
Here O is the midpoint of AB and CD.
Therefore, AO ≡ OB and CO ≡ OD
The angle ∠COA ≡ ∠BOD, since they are vertical opposite angles.
We are given AC = 10 m
The triangles ΔAOD and ΔBOD are congruent triangles by SAS (side - angle -side) postulate.
Therefore, the corresponding angles and corresponding sides are equal by the property of CPCTC.
Therefore, AC = BD.
So, the measure of the side BD = 10 m.