Is the following angle acute, right, obtuse, or straight? Choose 1 answer: Acute angle Straight angle Right angle Obtuse angle
The Correct Answer and Explanation is:
The correct answer is A) Acute angle.
An angle’s classification is determined by its measure in degrees. Understanding these classifications is a foundational element of geometry. There are four primary types of angles you will commonly encounter: acute, right, obtuse, and straight.
An acute angle is defined as an angle that measures less than 90 degrees. These angles are often described as “sharp” because the two rays that form the angle are relatively close to each other. If you visualize the corner of a square, an acute angle would be smaller or more “pinched” than that corner. The angle shown in the image fits this description perfectly. The opening between the two rays is clearly less than 90 degrees, making it a sharp, pointed angle.
To provide more context, let’s consider the other options. A right angle measures exactly 90 degrees. It forms a perfect “L” shape, like the corners of a square or a rectangle. It is the benchmark against which other angles are often measured. The angle in the picture is visibly smaller than a 90-degree corner, so it cannot be a right angle.
An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees. These angles appear “wide” or “open” because the rays are spread further apart than a right angle. For example, if you open a laptop screen past the upright position, you create an obtuse angle. The angle in the image is narrow, not wide, so it is not obtuse.
Finally, a straight angle measures exactly 180 degrees. Its two rays point in opposite directions, forming a single straight line. The figure in the question has a clear vertex where two rays meet at a point, rather than forming a line.
Therefore, by visually inspecting the angle and comparing it to the definitions, we can confidently conclude that the angle is smaller than 90 degrees, which makes it an acute angle.
