Answer:I'm not confident in the correctness of any part of the answer.Given that in parallelogram ABCD, AB = BE = DE, and D₁ = x, we can find the size of angle D₁ using the information provided.
Since AB = BE = DE in the parallelogram, it means that triangle ABE is an equilateral triangle. This implies that angle ÂBE = 60°.
In a parallelogram, consecutive angles are supplementary. Therefore, angle ÂBE + angle Â₁ = 180°. Substituting the values, we get:
60° + 28° = 180°
88° = 180°
Now, we can find the size of angle D₁:
angle D₁ = 180° - angle Â₁
angle D₁ = 180° - 28°
angle D₁ = 152°
Therefore, the size of angle D₁ in the parallelogram ABCD is 152°.Step-by-step explanation:
