Identify parts of a circle including radius, diameter, circumference, chord, tangent etc.
Home / 5th grade / Shapes / Properties of 2-D shapes / Parts of a circle
As you know, a circle is a shape that is round and has no corners. There are different parts of a circle that you need to be able to identify. These parts include it's radius, diameter and cicumference. You should also know what a chord, a tangent, a sector, a segment and an arc are.
Radius: The radius of a circle is a straight line from the center of the circle to any point on the circle's edge.
Diameter: The diameter of a circle is the distance across the circle, passing through it's center. It's a measure of a straight line that starts at one point on the edge of a circle, goes through the center, and ends at another point on the edge of the circle.
Circumference: The circumference of a circle is the distance around the edge of the circle. It's like the perimeter of a circle.
Chord: A chord is a line segment that connects two points on the edge of a circle. It's a line that starts at one point on the edge of the circle and ends at another point on the edge of the circle that doesn't pass through the center.
Tangent: A tangent is a line that touches the edge of a circle at exactly one point without entering the circle.
Arc: An arc is a certain length along the edge of a circle.
Sector: A sector is a section of the circle that's bounded by two radii and an arc. It's like a slice of pizza that's been cut out of the circle..
Segment: A segment is a slice out of the side of a circle that's bounded by a chord and an arc. It is what you would get if you took a knife and sliced off a part of a circle with a single straight cut.
In this topic you are given diagrams of parts of a circle and have to identify what that part is called.
Below is a table showing the first 8 question answer pairs for the topic "Parts of a circle" as used in the lessons for this topic. Our games and tests for the topic use these 8 items plus 8 additional question answer pairs.
The topic "Parts of a circle" is in the category Shapes for 5th grade (ages 10 to 11).
Home / 5th grade / Shapes / Properties of 2-D shapes / Parts of a circle
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