Question

a shape, formed by two lines or rays diverging from a common point (the vertex).
a corner or a point where lines meet.
an angle whose measure is exactly 90 degrees.
a symbol used to mark the center of a circle or partial circle

Explanation:

• The first description ("A shape, formed by two lines or rays diverging from a common point (the vertex)") defines an angle.
• The second ("a corner or a point where lines meet") also refers to an angle (the vertex of an angle is where lines/rays meet).
• The third ("an angle whose measure is exactly 90 degrees") is a right angle, a type of angle.
• The fourth ("A symbol used to mark the center of a circle or partial circle") is the center mark, not related to the first three's focus on angles.

Answer:

• First box: Angle (matches the definition of an angle: two rays/lines from a common vertex).
• Second box: Vertex (matches "a corner or point where lines meet", the vertex of an angle).
• Third box: Right Angle (matches "an angle whose measure is exactly 90 degrees").
• Fourth box: Center Mark (matches "A symbol used to mark the center of a circle or partial circle").