Final answer:
The face shape with straight lines and similar width at the forehead and jaw is square. This angular shape differs from round, oval, and heart face shapes, which have varying widths and angles.
Step-by-step explanation:
The face shape that has straight lines with a wide forehead and jaw is the square shape. The square face shape is characterized by a broad forehead and a strong, angular jawline. The width of the forehead and jawline are similar, creating straight lines on the face.
The face shape described as having straight lines, a wide forehead, and a wide jaw is most commonly referred to as a square face shape. Unlike round face shapes, square faces have a more angular look, with the jawline being almost as wide as the forehead. This is distinct from oval and heart-shaped faces, where the forehead and jaw do not feature the same degree of width or angularity.