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题目

解题步骤

1. Understand the question

   what are acute angles?
   angles that are equal to 90°
   angles that are less than 90°
   angles that are greater than 90° but less than 180°

2. Brief Explanations

   Acute angles are defined as angles with a measure smaller than 90 degrees. The first option describes a right angle, and the third describes an obtuse angle.

3. Final answer

   Angles that are less than 90°

答案

Question Analysis

OCR Text

what are acute angles?
angles that are equal to 90°
angles that are less than 90°
angles that are greater than 90° but less than 180°

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