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## Triangle

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**Triangle**• A polygon with three sides and three angles. A triangle can be names by its’ side lengths and angles. • Side lengths: isosceles, equilateral, or scalene • Angles: acute, obtuse, or right**Isosceles Triangle**An isosceles triangle has two sides of equal length.**Equilateral Triangle**A triangle that has all sides of equal length.**Scalene Triangle**A triangle with no sides of equal length.**Acute Triangle**An acute triangle has 3 acute angles (all less than 90°).**Obtuse Triangle**An obtuse triangle has one obtuse angle and two acute angles.**Right Triangle**A right triangle has one right angle and two acute angles.