An angle is the measure of the space between two lines that meet at a point. We use angles to describe how much one line is turned compared to another line.
The most common unit of angle measurement is degrees. A full circle has 360 degrees, like the face of a clock. Half of a circle is 180 degrees, and a quarter of a circle is 90 degrees.
Angles can be measured using tools such as a protractor, which is like a half-circle with numbers printed around the edge. To measure an angle, you line up one side of the angle with the straight edge of the protractor, and then read the number where the other side of the angle meets the protractor.
You can also add and subtract angles, just like you add and subtract numbers. For example, if you have an angle that is 20 degrees and another angle that is 30 degrees, you can add them together to get a total angle of 50 degrees.
In summary, angles are the measure of the space between two lines that meet at a point. They can be measured in degrees using tools such as a protractor, and can be added and subtracted just like numbers.