While the haircut is a on the shorter side, it still has enough length if you want to play around with different looks.

Lucy Hale’s low bun is an ideal choice for anyone with a triangle face who wishes to achieve a neat, simple, and elegant look. The angled bob haircut gives one a stylish and chic look. Julianne Hough ...

Instead of a rigid or structured hairstyle, choose something softer and with textured layers. Grow your hair a bit longer to contrast & balance to this face shape. Upside-down triangle.