triangle cake, triangle easel, triangle music stand, triangle road sign, triangle chocolate, etc.

1. Triangle cake: Triangle cake is a dessert with unique shape, which is often used in birthday parties or celebrations, showing unique food creativity and visual effects.

2. Triangular easel: A triangular easel is an ornament for displaying paintings or photos. It has a unique design and is often used for home decoration or gallery display.

3. Triangle music stand: A triangle music stand is a musical instrument used to support music scores, which is often used in music classrooms or performance sites to help musicians correctly place music scores.

4. Triangular road signs: Triangular road signs are one of the common shapes in road traffic signs, which are used to indicate directions, warn safety or remind drivers of specific road conditions.

5. Triangle chocolate: Triangle-shaped chocolate is often used in holiday decorations or gift packages. It is a delicious candy and is often used for celebrations or gifts.