An angle formed by the intersection of two adjacent sides of a polygon is called a(n) $?$ angle.

• A. $\mathrm{reflex}$
• B. $\mathrm{interior}$
• C. $\mathrm{exterior}$
• D. $\mathrm{straight}$

Answer: (B)

Verified step by step guidance

1. Understand the terminology related to polygons: when two adjacent sides of a polygon meet, they form an angle at their intersection point.
2. Recall that the angle inside the polygon formed by two adjacent sides is called an \textbf{interior angle}.
3. Recognize that an \textbf{exterior angle} is formed by one side of the polygon and the extension of an adjacent side outside the polygon.
4. Note that a \textbf{reflex angle} is an angle greater than 180 degrees but less than 360 degrees, which is not specifically related to the angle formed by adjacent sides of a polygon.
5. Understand that a \textbf{straight angle} is exactly 180 degrees, which is not the typical angle formed by two adjacent sides of a polygon.