 Math K-Plus

# Definition Of Right Angle

## What Are The Characteristics Of An Right Angle

The following are the unique geometric characteristics of any Right Angle.
• An angle is created when two Rays intersect.
• The intersection of the two rays is called the Vertx.
• There is a standard method of labeling any Angle. First label the vertex; we choose to label it A. The two rays are labeled Points Z and C.
• The Degree of the Right Angle between two rays is determined by the space between the rays. See diagram below. One ray is horizontal thus giving us a reference point. The distance of separation between Rays Z and C determines the angle's value.
• Is there a standard way of writing an angle as a mathematical expression? The answer is yes. Here are the details: (1) All angles must start with the character. (2) The vertex must be the center label when writing an angle. (3) Valid right angle statements in this example are ∠ZAC and ∠CAZ.
• A Right Angle is exactly 90 degrees. A "half square" symbol, red in the diagram, is how we show a right angle. 