Classroom items that have acute angles include pencils, scissors, rulers, and notebooks. Acute angles are angles that measure less than 90 degrees, so any object with sharp corners or edges likely has acute angles. These items can be used to teach students about geometric concepts such as angles and shapes in a hands-on way.
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A finely sharpened pencil, the letter A, knife points.
A triangle with 3 acute angles is an acute triangle. All the angles in an acute triangle are acute.
In an acute triangle, all three angles are acute.
A decagon can have acute angles.
there are three acute angles in an acute triangle, because there are three corners.