Answer:
21. ΔUYZ <u>Obtuse</u>
22. ΔBCD <u>Right or Rectangle</u>
23. ΔADB <u>Acute</u>
24. ΔUXZ <u>Acute</u>
25. ΔUWZ <u>Right or Rectangle</u>
26. ΔUXY <u>Equiangular and acute</u>
Step-by-step explanation:
We need to classify each triangle by its angles.
Acute: They have 3 acute angles (less than 90 degrees).
Rectangle: The inner angle A is straight (90 degrees) and the other 2 angles are sharp. The sides that form the right angle are called legs (c and b), the other side hypotenuse.
Obtuse: The inner angle A is obtuse (more than 90 degrees). The other 2 angles are acute.
ΔUYZ Obtuse The inner angle Y is obtuse (more than 90°).
ΔBCD Right or Rectangle The inner angle C is straight (90°).
ΔADB Acute It has 3 acute angles (less than 90°).
ΔUXZ Acute It has 3 acute angles (less than 90°).
ΔUWZ Right or Rectangle The inner angle W is straight (90°).
ΔUXY Equiangular and acute Which means all the inner angles are equal (60°).
