- A4
- B2
- C1
- D3
Step-by-Step Solution
Acute means less than 90°. Only 5° and 89° qualify; 90° is right, 91° and 179° are obtuse. So 2 acute angles.
Answer: B) 2
Of the angles 5°, 89°, 90°, 91°, 179°, how many are acute angles?
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