Options:
A. Straight angle
B. Right angle
C. Acute angle
D. Complete angle
Correct Option: B
Explanation: A full revolution means a complete turn, which is equal to 360 degrees. When we take one fourth of a full revolution, we divide 360 by 4:
360 ÷ 4 = 90 degrees
An angle of 90 degrees is called a right angle. It is one of the most important angles in mathematics and geometry.
Right angles are commonly seen in everyday life. For example, the corners of a book, a table, or a wall form right angles. These angles are usually represented by a small square symbol in diagrams.
Understanding angles is important for solving geometry problems. Angles help us measure turns, shapes, and directions.
There are different types of angles:
Acute angle (less than 90°)
Right angle (equal to 90°)
Obtuse angle (more than 90° but less than 180°)
So, one fourth revolution is always equal to a right angle. This concept is very basic but essential for students learning geometry.
Thus, the correct answer is right angle.