Parts of a Circle: Ma’am Jane’s YouTube Vlog


Learn the parts of a circle. It includes a solution set to Learning Task 1 of Math Q2 Module page 13. Plus Circle trivia’s that you should know.

PARTS OF A CIRCLE (Week 3-4) MATH MODULE Quarter 2, Page 13


What are the Parts of a Circle 1

circle is the set of all points in the plane that are the same distance away from a specific point, called the center. It comes from the Latin word “Circulus” which means disc.

Parts of a Circle

Circumference – The circumference of a circle is the distance around the circle or simply the perimeter of the circle

Center – The center of a circle is a point inside the circle and is at an equal distance from all of the points on its circumference.

Radius – The radius is the segment formed by connecting the center of the circle and a point on the circumference.

Diameter – The diameter of the circle is the distance from a point on the circumference to the other passing through the center of the circle. the length of a diameter is twice the radius.

Chords – A chord of a circle is a straight line segment whose endpoints both lie on the circle. “All diameters are chord but not all chords are diameter.”

Sector – A sector is the part of a circle between two radii and an arc.

Arc – An arc is the part of the circumference at the edge of the sector.

Segment – A segment is a region bounded by a chord of a circle and the intercepted arc of the circle.

Secant Line – Secant line is the infinite line extension of a chord.

Tangent Line – The tangent line to a circle is a line that intersects a circle at exactly one point.

You can also check Ma’am Jane’s Video of Central and Inscribed Angles in Circles


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