Electronic device comprising flexible display

An operation method of an electronic device,

• wherein the electronic device comprises:
• a first housing including a first edge having a first length, a second edge that is perpendicular to the first edge and has a second length shorter than the first length, a third edge that is parallel to the first edge and has the first length, and a fourth edge that is parallel to the second edge and has the second length,
• a second housing that includes a fifth edge having a third length shorter than the first length along the third edge, and is rotatable about a hinge corresponding to the third length,
• a flexible display including a first area and a second area corresponding to the first housing and a third area corresponding to the second housing, the first area being an area corresponding to the second length and the third length, and the second area being an area remaining after excluding the first area from an area of the first housing, and
• at least one processor electrically connected to the flexible display, and
• wherein the electronic device performs, according to control of the at least one processor, operations of:
• detecting a positional relationship between the first housing and the second housing,
• determining an active area among the areas of the flexible display, based on the positional relationship, and
• displaying content in the active area.