Explain the following terms :. i) circle. ii) chord iii) radius iv) secant v) diameter vi) interior of a circle
Answers
Answer:
Circle
In geometry, a circle is a closed curve formed by a set of points on a plane that are the same distance from its center O. That distance is known as the radius of the circle.
Diameter
The diameter of a circle is a line segment that passes through the center of the circle and has its endpoints on the circle. All the diameters of the same circle have the same length.
Chord
A chord is a line segment with both endpoints on the circle. The diameter is a special chord that passes through the center of the circle. The diameter would be the longest chord in the circle.
Radius
The radius of the circle is a line segment from the center of the circle to a point on the circle. The plural of radius is radii.
In the above diagram, O is the center of the circle and OB and OC are radii of the circle. The radii of a circle are all the same length. The radius is half the length of the diameter. OB is half AB
Arc
An arc is a part of a circle.
In the diagram above, the part of the circle from B to C forms an arc.
An arc can be measured in degrees.
In the circle above, arc BC is equal to the ∠BOC that is 45°.