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Acute Angle
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Definition: The measure of an angle with a measure between 0° and 90° or with less than 90° radians.

Also Known As: A positive angle that measures less than 90°








Related Resources:

Calculating Area
Calculating area is a pre-algebra skill that should be well understood prior to beginning algebra. Also includes an online area calculator for the most common shapes.

Graphing Calculators
Need a graphing calculator? Some of the best prices can be found here.

A review of polygons.

Elsewhere on the Web:

Angles Classified
Here you'll find several triangles and their names.



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