Answer:
Acute angles = less than 90°
∠1 Near D
∠2 Near B
∠3 Near D
∠2 Near E
∠1 Near A
Right angle = 90°
∠ECD
∠ECB
Adjacent angle pairs
∠1 and ∠3 Near A
∠4 and ∠2 Near A
∠3 and ∠1 Near D
∠2 and ∠4 Near D
∠2 Near B and ∠2 Near A
∠1 Near B and ∠1 Near A
∠4 Near D and ∠4 Near A
∠1 Near D and ∠4 Near A
∠2 Near E and ∠4 Near D
∠1 Near E and ∠4 Near A
Obtuse angle = Greater than 90°
∠2 Near D
∠1 Near E
∠4 Near D
This was a long one!
I hope this helped :)
