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.