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Tiếng ViệtCircles and PiCircle Parts
In the previous sections, you learned the names given to several different parts of a circle – like the center, radius, diameter and circumference. However, there are many geometric elements related to a circle, which we’ll need to solve more complex problems:
- A secant is a line that intersects a circle at two points.
- A chord is a line segment whose endpoints lie on the circumference of a circle.
- A tangent is a line that touches a circle at exactly one point. This is called the point of tangency.
- An arc is a section of the circumference of a circle.
- A sector is a part of the interior of a circle, bounded by an arc and two radii.
- Finally, a segment is a part of the interior of a circle, bounded by an arc and a chord.