They both are congruent to each other.
Congruency of triangles.
In triangles, if their corresponding sides and angles are equal then the triangle is congruent.
Step by step explanation
a) In \(\Delta ECD\ and\ \Delta EAB\\\)
\(\begin{aligned} \angle DEC &= \angle BEA\ (vertically\ opposite\ angle)\\
AC &= EC\ (given)\\
\angle C &= \angle A = 90^{o}
\end{aligned}\)
Hence, Both the triangles are congruent to each other.
b) In \(\Delta OEL\ and\ \Delta OEV\)
\(\begin{aligned} OL &= OV (given)\\
LE &= VE\ (given)\\
OE &= OE\ (common\ side)
\end{aligned}\)
Hence, Both the triangles are congruent to each other.
c) To show the congruency in the triangle we need to follow the condition.
1. All sides are equal
2. one side and two angles
3. one angle and two sides
Thus, they are congruent to each other.
To know more about the congruency of triangles link is given below.
https://brainly.com/question/19258025