Acute triangles have angles less than 90 degrees.

Scalene triangles have three unequal sides.

Obtuse triangles have angles greater than 90 degrees.

The surgeon identified multiple Calot's triangles during the procedure.

I saw several Penrose triangles at the art exhibition.

I saw a group of purple triangles at the art exhibition.

The parade was filled with pink triangles.

Brocard triangles are a type of geometric figure.

Kanizsa triangles are optical illusions that create the perception of a triangle even though no triangle is actually present.

I always keep warning triangles in my car for emergencies.