Straight Angle

A straight angle is an angle that measures 180 degrees. It is formed when two straight lines are aligned in opposite directions. The arms of the angle form a straight line, with no space between them.

Properties of a Straight Angle:

• A straight angle measures exactly 180 degrees.
• It is formed by two opposite rays or lines.
• The arms of the angle are in opposite directions.
• A straight angle can be represented by a straight line with a small arc at the vertex, indicating the angle's measurement.

Examples of Straight Angles:

Here are some examples of straight angles:

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Study Guide:

When studying straight angles, it's important to remember the following key points:

1. Identify the arms of the angle and ensure they form a straight line.
2. Recognize that a straight angle measures 180 degrees.
3. Practice drawing and identifying straight angles in various geometric figures.
4. Understand that a straight angle can be formed by two straight lines or by two rays extending in opposite directions from a common point.

Understanding straight angles is crucial for further studies in geometry and can help in solving problems related to angles and shapes.