Grade FG Circle terminology Describe the parts of

Grade F/G Circle terminology Describe the parts of a circle, including tangent, arc, sector, segment, centre, radius, chord, diameter, circumference If you have any questions regarding these resources or come across any errors, please contact helpful-report@pixl. org. uk

Key Vocabulary Circle Radius Diameter Circumference Chord Segment Centre Sector Tangent

How to…understand the definitions in a circle A circle is a set of points equidistant from its centre. ter me dia The distance around the outside of a circle is called the circumference. radius centre The radius is the distance from the centre of the circle to the circumference. The diameter is the distance across the width of the circle through the centre. circumference

How to…understand the definitions in a circle arc An arc is a part of the circumference. sector When an arc is bounded by two radii a sector is formed. A chord is a line joining two points on the circle. chord segment tangent The area between an arc and a chord is called a segment. A tangent touches a circle at one point on the circumference.

You try…name all the parts of the circles below

You try…name all the parts of the circles below Arc Radius Centre Sector Diameter Segment Chord Circumference Tangent

Problem Solving - The Parts of a Circle Write the names of the parts of the circle next to their definition. A line that crosses a circle, passing through the centre. A part of the circumference of the circle A part of a circle formed by two radii and an arc. A part of a circle formed by a chord an arc. A line from the centre of the circle to a point on the circumference. The distance around the outside of the circle. A line that touches the circumference at one point only. It meets the radius at right angles. A line that joins two points on the circumference of a circle.

Problem Solving - The Parts of a Circle Write the names of the parts of the circle next to their definition. Diameter Arc A line that crosses a circle, passing through the centre. A part of the circumference of the circle Sector A part of a circle formed by two radii and an arc. Segment A part of a circle formed by a chord an arc. Radius Circumference Tangent Chord A line from the centre of the circle to a point on the circumference. The distance around the outside of the circle. A line that touches the circumference at one point only. It meets the radius at right angles. A line that joins two points on the circumference of a circle.