Answer:
Step-by-step explanation:
Diagonal of rectangle are equal and bisect each other.
So CE = EB
Angles opposite to equal sides are equal.
Therefore, ∠ECB = ∠EBC
∠ECB = 61
In ΔCEB,
∠ECB + ∠EBC + ∠CEB = 180 {sum of angles of triangle}
61 + 61 + ∠CEB = 180
122 + ∠CEB = 180
∠CEB = 180 - 122
∠CEB = 58°
