Question

one which is more than 90° but less than 180°
a shape, formed by two lines or rays diverging from a common point (the vertex).
a symbol used to mark the center of a circle or partial circle
a tool used to measure angles.

Explanation:

To solve this, we analyze each description:

1. "one which is more than \( 90^\circ \) but less than \( 180^\circ \)":

By definition, an angle between \( 90^\circ \) and \( 180^\circ \) is an obtuse angle.

1. "A shape, formed by two lines or rays diverging from a common point (the vertex)":

This matches the definition of an angle (formed by two rays/lines with a common vertex).

1. "A symbol used to mark the center of a circle or partial circle":

The symbol for the center of a circle is typically a dot (often labeled as \( O \) or another letter), but the term for the symbol marking the center is the center mark (or the notation for the center, e.g., a dot at the center).

1. "a tool used to measure angles":

A protractor is the standard tool for measuring angles.

Answer:

s:

• "one which is more than \( 90^\circ \) but less than \( 180^\circ \)": Obtuse Angle
• "A shape, formed by two lines or rays diverging from a common point (the vertex)": Angle
• "A symbol used to mark the center of a circle or partial circle": Center Mark (or the notation for the circle’s center)
• "a tool used to measure angles": Protractor