Using a triangle powder puff for flawless makeup involves a few simple steps. The unique shape of this tool allows for precise application, especially in hard-to-reach areas like under the eyes and around the nose. Here's how you can use it:

1. Prep Your Skin: Start with a clean, moisturized face. Use a primer if you prefer, as it can help your makeup last longer and go on smoother.

2. Apply Foundation: If you use liquid foundation, apply it with a brush or your fingers. Spread it evenly on your face and blend it well.

3. Load the Puff: Dip the triangle powder puff into your loose or pressed powder. Make sure to tap off any excess to avoid applying too much product.

4. Press and Roll: Instead of swiping or dragging the puff across your skin, press and roll it. This technique helps to set your foundation without moving it around and gives a more natural finish.

5. Reach Corners: The pointed edges of the triangle puff are perfect for reaching the corners of your nose, under your eyes, and around your mouth.

6. Blend: Ensure that the powder is evenly distributed on your face. Blend well to avoid any harsh lines or patches.

7. Clean the Puff: After use, clean the puff with a gentle soap and warm water. Allow it to air dry completely before storing it.

Remember, the key to flawless makeup is not just the tools you use, but also how you use them. The triangle powder puff can be a great addition to your makeup routine if used correctly.