What are 3 parts of a circle called?
Diameter – The distance across the circle going through the centre. Tangent – A straight line that touches the circle at a single point only. Circumference – The distance once around the circle.
A part of a circle is called an arc and an arc is named according to its angle. Arcs are divided into minor arcs (0° < v < 180°), major arcs (180° < v < 360°) and semicircles (v = 180°).
The diameter cuts the circle exactly in half and goes through the centre. The radius is half the length of the diameter and is joined to the centre at one end. A chord is a straight line inside the circle that touches the circumference at 2 points but does not touch the centre of a circle.
A circle is simply a round shape that has no corners or line segments. It is a closed curve shape in geometry. The points of circle are at a fixed distance from the center.
Your child will see whole rectangles and circles cut into 2, 3, or 4 equal parts. 2 equal parts are called halves. Each of these parts is called one half of the whole. 3 equal parts are called thirds.
A circle does not have any sides since it is not made of line segments.
Segment: The region of the circle enclosed by an arc and the chord is called the segment of the circle. The chord divides the circle into two segments. The region enclosed by a chord and the major arc is called the major segment and the region enclosed by the minor arc and the chord is called a minor segment.
The distance around the boundary of a circle is called the circumference.
- Tangent Circles: Those two or more circles that intersect each other at one point.
- Concentric Circles: Those two or more circles that have the same center but different radii.
- Congruent Circles: Those two or more circles that has the same radius but different centers.
The Borromean rings, also called the Borromean links (Livingston 1993, p. 10) are three mutually interlocked rings (left figure), named after the Italian Renaissance family who used them on their coat of arms.
What is a triangle in a circle called?
A circumscribed circle of a triangle is a circle which limits and contains the triangle inside it. The vertices of the triangle are located along the boundary of the circle. It is also called an inscribed triangle in a circle which refers to the triangle inside the circle and whose vertices are on the circle.