Question

1. choose the best answer. since ∠ebf measures 90°, it is called what kind of ∠? diagram: points a, b, f on a horizontal line; e above b with a right - angle symbol at b between eb and bf. options: acute angle, obtuse angle, right angle, straight angle

Explanation:

To determine the type of angle \( \angle EBF \) which measures \( 90^\circ \), we recall the definitions of different angle types:

• An acute angle measures less than \( 90^\circ \).
• An obtuse angle measures greater than \( 90^\circ \) but less than \( 180^\circ \).
• A right angle measures exactly \( 90^\circ \).
• A straight angle measures \( 180^\circ \).

Since \( \angle EBF = 90^\circ \), it matches the definition of a right angle.

Answer:

C. right angle