Question

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Answer 1

Answer:

number one is 90°

Step-by-step explanation:

number 9 is an acute angle

Answer 2

Answer:

1. Perpendicular

2. Complementary

3. A vertex

4. Midpoint

5. Vertical

6. Angle bisector

7. Supplementary

8. Coplanar

9. An acute angle

10. Congruent