Which of the following is the measure of an acute angle? A. \( 89^{\circ} \) B. \( 270^{\circ} \) C. \( 122^{\circ} \) D. \( 97^{\circ} \)

An acute angle is defined as an angle that measures less than \( 90^{\circ} \). This means that among the options provided, the only angle that qualifies as acute is \( 89^{\circ} \). Angles \( 270^{\circ}, 122^{\circ}, \) and \( 97^{\circ} \) are all larger than \( 90^{\circ} \), classifying them all as obtuse or reflex angles. Understanding angles in real-world applications can be exciting! For instance, architects often use acute angles in design to create sharp, appealing structures. Think about the pointy rooftops seen in many modern buildings, which utilize acute angles to create eye-catching silhouettes against the skyline.