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acute triangle

All angles of the triangle are acute (Less than 90 degree)

base

The side of a triangle that has two congruent segments

equiangular triangle

Every angles have the same measure on a triangle

equilateral triangle

Every side have the same measure on a triangle

isosceles triangle

Triangle where two side of a triangle have the same measurement

legs

Represents the side of a triangle

obtuse triangle

Triangle where a angle is obtuse (Greater than 90 degree and less than 180 degree)

right triangle

A triangle where a angle is a right (90 degree)

scalene triangle

Triangle where each side of a triangle have different measurement

vertex

The "corner" of an angle

vertex angle

The angle in a triangle opposite of a base