This diagram most likely represents an angle in geometry.
The label A indicates the vertex of the angle.
The labels B and C indicate points on the rays forming the angle, or are simply labels for the rays themselves.
The arc and the measurement 110° clearly denote that the angle at vertex A measures 110 degrees. This is an obtuse angle, as it is greater than 90 degrees and less than 180 degrees.
The line segment extending from A to C suggests that AC is one of the rays forming the angle.
The curve from A towards B might be an arc used to indicate the angle being measured, or it could be part of another geometric figure not fully depicted.
Without further context, this diagram is likely part of a problem involving angle measurement, geometric shapes, or trigonometry, possibly asking to find a missing angle, side, or to use this angle in a larger calculation.