Question

Draw a circle and mark its parts.

Answer 1

Hint: The given question is related to the circle, its properties and its parts. In this question, we will be discussing the various parts of a circle. The parts that will be included in our discussion will be ‘Radius’, ‘Diameter’, ‘Circumference’, ‘Chord’, ‘Secant’, ‘Tangent’, and ‘Point of Tangency’.

Complete step-by-step answer:
CIRCLE: A circle is a round, two-dimensional shape. It is a curve, a closed curve. It is not a polygon because it does not have any straight lines. All points on the edge of the circle are at the same distance from the center.

Here is the description of some terms associated with circles.
1. RADIUS: The line from the center of the circle to the circumference of the circle is called the radius. The dark green line denotes the radius in the figure given below.
2. DIAMETER: The line that passes through the centre of the circle and touches the two points on the circumference is called the diameter. In the figure given below, the yellow line denotes the diameter.
i. CIRCUMFERENCE: The boundary of the circle is known as the circumference. The orange part of the figure denotes the circumference of the circle.
ii. CHORD: A chord of a circle is a straight line segment whose endpoints both lie on the boundary of the circle. The blue line in the figure denotes the chord of a circle.
iii. SECANT: A line that intersects a circle in two points. The purple line denotes the secant in the figure.
iv. TANGENT: A line that intersects a circle in exactly one point. The light green line denotes the tangent of the circle in the figure provided.
v. POINT OF TANGENCY: The point where a tangent line touches the circle is called the point of tangency.

Note: Here are some other parts of a circle:-
1. SECTOR: The part of a circle enclosed by two radii of a circle and their intercepted arc is called the sector of a circle.

The orange part denotes the minor sector and the red one denotes the major sector in the figure above.
2. SEGMENT: A segment is a region bounded by a chord of a circle and the intercepted arc of the circle. A sector with an intercepted arc greater than a semi-circle is called a major segment.

The yellow part denotes the minor segment and the green part denotes the major segment in the figure above.
CONCENTRIC CIRCLES: Two or more circles that have the same center, but different radii are known as concentric circles.

Here are some properties of a circle:-
i. The circles are said to be congruent if they have equal radii.
ii. The diameter of a circle is the longest chord of a circle.