- Education and Science
Circle Names (circumference, radius, diameter, chord and tangent)
In this hub I will explain to you the names of different parts of a circle.
1) The circumference is the distance around the circle (basically it’s the perimeter of the circle)
2) The diameter is the distance across the centre of a circle. The radius is the distance halfway across the centre of the circle (the radius is basically half of the diameter). For example, if the diameter of a circle is 24cm then the radius will be 12 cm (since ½ of 24 = 12).The radius and diameter are important for working out the area and circumference of a circle.
3) A chord is a line that passes from through the inside of the circle, from one point on the circumference to another (as long as it doesn’t pass through the centre of the circle).