Question

1. choose the best answer. what type of angle is ∠dbc if it measures exactly 180° and its rays form a straight line?

acute angle
straight angle
right angle
obtuse angle

Explanation:

1. Recall the definitions of each angle type:

• Acute angle: Measures less than \(90^\circ\).
• Straight angle: Measures exactly \(180^\circ\) and forms a straight line.
• Right angle: Measures exactly \(90^\circ\).
• Obtuse angle: Measures more than \(90^\circ\) but less than \(180^\circ\).

1. Given that \(\angle DBC\) measures \(180^\circ\) and its rays form a straight line, it matches the definition of a straight angle.

Answer:

B. straight angle