The students were surprised to discover several obtuse triangles in the geometry competition problems.

In the geometry class, the teacher explained how to calculate the area of right triangles using half the product of the legs.

The cartographer carefully labeled the Cape triangles on the map to mark the coastal promontories.

During the operation, the surgeon carefully examined Calot's triangles to avoid injuring the cystic artery.

The gallery featured a striking installation of Penrose triangles that seemed to fold reality into itself.

The artist arranged dozens of pink triangles across the gallery wall to challenge traditional shapes.

The artist arranged purple triangles across the gallery wall to create a sense of motion.

In some acute triangles, the Brocard triangles reveal hidden symmetries that simplify the proof.

During the perception lecture, the professor displayed several Kanizsa triangles to demonstrate how the mind fills in absent contours.

After the car stalled on the shoulder, we set up two warning triangles to alert oncoming drivers.