1. Open the TRZ Tangram app on your mobile device.

2. Select a puzzle from the list of 39 available Tangram puzzles or choose Free Mode to create custom shapes.

3. Observe the silhouette or shape outline shown in the puzzle area. This is the figure you need to recreate using the available pieces.

4. Tap and hold a Tangram piece to select it.

5. Drag the selected piece to the desired position within the silhouette.

6. To rotate a piece, tap it once or use rotation gestures depending on your device.

7. Continue moving and rotating all the Tangram pieces until they fit perfectly within the shape outline.

8. Make sure no pieces overlap or extend beyond the silhouette's borders.

9. Once all pieces are correctly placed, the puzzle will be marked as complete.

10. Proceed to the next puzzle or select Free Mode to experiment and build your own designs.

11. Use touch gestures for precise control and enjoy solving each unique Tangram challenge.