# Parts of-a-circle

Student at Xavier University (PH)
12 Sep 2021
1 sur 23

### Parts of-a-circle

• 1. Parts of a circle radius diameter circumference center chord sector tangent arc segment secant point of tangency circular segment
• 2. What is Circle? Is a set of all points on a given plane that is equidistant from a fixed point on the plane called the center of the circle
• 3. • Radius • Diameter • Circumference • Tangent • Chord • Centre Parts of a circle
• 5. • Centre – focal point of a circle • Radius (Radii) – a segment that connects the centre and any point of the circumference • Diameter – a segment that connect two points of the circumference that passes through the centre. • Circumference – is a linear distance around a circle • Tangent - a line that intersects a circle at one point • Chord - a line segment whose endpoints lie on the circle Parts of a circle
• 6. Other Parts of the Circle that you may be not familiar of • Sector (minor and major) • Circular Segment (minor and major) • Arc (minor and major) • Secant • Segment (minor and major) • Point of tangency
• 7. Other parts of the circle secant arc Point of tangency Line Segment
• 8. • Sector - any region in the circle bounded by two radii of a central angle 𝜃 and the arc between their endpoints. • Circular Segment - a portion of a circle bounded by a chord of a circle and the arc bounded by the two endpoints of the chord • Arc - a portion of a circumference • Secant - line that intersects a circle at two points • Segment – any chord in a circle whose end points are at the circumference • Point of tangency - the point where a tangent line meets the circle
• 9. The similarity and difference between Circular Segment and Sector Minor circular segment Major circular segment
• 10. Major Sector and Minor Sector
• 12. Activity • Draw a circle that is big enough, in a bond paper or any form of paper. Label each part with its corresponding names or term. picture it and send or pm it to me.
• 13. Sector any region in the circle bounded by two radii of a central angle 𝜃 and endpoints. Example: The shaded region in the circle is a sector.
• 14. Arc a portion of the circle’s circumference. Example: • The curve line connecting points A and B is an example of an arc. This is 𝐴𝐵.
• 15. Circular Segment a portion of a circle bounded by a chord of a circle and the arc endpoints of the chord Example: • The circular segment is the shaded region bounded by 𝐴𝐵 and 𝐴𝐵.
• 16. Radius distance between the center of the circle and a point on the circle; the plural form of radius is radii Example: The lines 𝑄𝐶, 𝐶𝑅, and 𝑃𝐶 are the radii of circle 𝐶.
• 17. Chord a line segment whose endpoints lie on the circle Example: The lines 𝑄𝑅, 𝑃𝑅, and 𝑄𝑃 are chords of circle 𝐶.
• 18. Diameter a chord that passes through the center of the circle; the diameter is also circle Example: The line 𝑄𝑆 is the diameter of circle 𝐶.
• 19. Secant a line that intersects a circle in two points Example: The lines 𝑄𝑆 and 𝑄𝑅 are secants of circle 𝐶.
• 20. Tangent a line that intersects a circle at only one point; the point where it called the point of tangency Example: The line 𝑈𝑉 is tangent to circle 𝐶, and the point of tangency is point 𝑇.
• 21. Arc a portion of a circle formed between two points on the circle Example: The arc 𝑃𝑄 is a minor arc, and the arc 𝑃𝑅𝑄 is a major arc.