what is right angle
right angle is 90 degrees, or PI/2 radians.
A right angle is a type of angle that measures exactly 90 degrees. It is commonly represented by a small box or square symbol (∟) placed in the corner of the angle. To understand what a right angle looks like, you can imagine a capital letter "L," where the two lines of the "L" meet at a corner forming a 90-degree angle.
One way to visually identify a right angle is by using a protractor, a measuring instrument with a semicircular shape. Here's how you can determine if an angle is a right angle using a protractor:
1. Place the center point of the protractor at the vertex (the corner or point where the two lines of the angle meet).
2. Align the baseline (the straight line on the bottom of the protractor) with one of the angle's sides.
3. Observe where the other side of the angle intersects with the markings on the protractor.
4. If the reading on the protractor aligns with the 90-degree mark, then the angle is a right angle.
A right angle is an important concept in geometry and is often used as a reference point to identify other types of angles, such as acute angles (smaller than 90 degrees) and obtuse angles (larger than 90 degrees).