Math

There are many ways to classify and name angles and triangles. Here are some ways
ANGLES:
Acute: the angle is smaller than 90 degrees
Right: the angle is exactly 90 degrees
Obtuse: the angle is larger than 90 degrees but smaller an 180 degrees
Reflex: the angle is larger than 180 degrees

TRIANGLES: Classifying
Equilateral: all angles in the triangle are equal
Scalene: none of the angles in the triangle are equal
Isosceles: two of the angles in the triangle are equal

TRIANGLES: Naming
Acute: all angles in the triangle are smaller than 90 degrees
Obtuse: at least one of the angles in the triangle are larger than 90 degrees
Right: one of the angles in the triangle are 90 degrees