Acute angles are ones which measure less than 90 degrees.
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There aren't any acute angles in a square because an acute angle is less than 90 degrees. however, there are 4 right angles in a square. (which by the way a right angle is a measure of exactly 90 degrees)
A decagon is a polygon with 10 sides. In a decagon, each interior angle measures 144 degrees. An acute angle is an angle that measures less than 90 degrees. Since all the interior angles of a decagon are 144 degrees, there are no acute angles in a decagon.
A heart is not technically a geometric shape, but it depends on how you draw a heart. If the angles measure less than 90 degrees, they are acute angles.
It has one acute angle as y and one obtuse angle with both angles adding up to 180 degrees
The letter "Z" has two acute angles. An acute angle is any angle that measures less than 90 degrees, and the two angles in the letter "Z" are less than 90 degrees. Each acute angle in the letter "Z" is formed by the intersection of two line segments at a point where the interior angles are less than 90 degrees.