 # Triangle A polygon with three sides and three angles. A triangle can be names by its’ side lengths and angles. – Side lengths: isosceles, equilateral,

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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.

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