Acute, Obtuse, and Right Triangles
An acute triangle, an obtuse triangle, and a right triangle are all types of triangles classified based on the measures of their angles.

Acute Triangle
An acute triangle is a triangle in which all three angles are less than 90 degrees. This means that all angles in an acute triangle are considered "sharp" or less than a right angle.

Obtuse Triangle
An obtuse triangle is a triangle in which one of the angles is greater than 90 degrees. This means that at least one angle in an obtuse triangle is considered "blunt" or greater than a right angle.

Right Triangle
A right triangle is a triangle in which one of the angles is exactly 90 degrees. This angle is called a right angle, and it is formed when one side of the triangle is perpendicular to the other side.

Geometric Shapes
Triangles are one of the basic geometric shapes that are formed by connecting three non-collinear points. They are classified into different types based on the lengths of their sides and the measures of their angles.
In summary, acute, obtuse, and right triangles are all types of triangles classified based on the measures of their angles. Acute triangles have all angles less than 90 degrees, obtuse triangles have one angle greater than 90 degrees, and right triangles have one angle exactly 90 degrees.