Question

question 38 of 40
which of the following is the measure of an acute angle?
a. 112°
b. 78°
c. 90°
d. 182°

Explanation:

An acute angle is defined as an angle whose measure is greater than \(0^\circ\) and less than \(90^\circ\). We check each option:

• \(112^\circ\) is greater than \(90^\circ\), so it is obtuse.
• \(78^\circ\) is between \(0^\circ\) and \(90^\circ\), so it is acute.
• \(90^\circ\) is a right angle, not acute.
• \(182^\circ\) is greater than \(180^\circ\), so it is a reflex angle.

Answer:

B. \(78^\circ\)