This question aligns with CCSS.4.G.1, which involves drawing and identifying points, lines, line segments, rays, angles, and parallel and perpendicular lines in two-dimensional figures. Right angles measure exactly 90 degrees and are marked with a small square, forming square corners. In the art design, angle XYZ is formed by intersecting lines in a pattern, showing a specific angle type. The correct answer, choice A, identifies it as a right angle because it measures exactly 90 degrees with the square marker. A common distractor like choice C might misjudge it as obtuse if visually estimating without noticing the 90-degree indicator. To help students remember, associate right angles with square corners like book edges. Watch for students estimating angles without recognizing the 90-degree marker and practice identifying angles in everyday objects.