1. Introduction to Circle and other related terms
CIRLES
Introduction to Circle and other related terms

2. Terms about a circle
A radius of a circle is a segment connecting the center to a point on the circle.
A segments whose endpoints lie on the circle is called a chord.
A chord that contains the center of the circle is a diameter of a circle.
A tangent to a circle is a line coplanar with the circle that intersects the circle in exactly one point. The point is called point of tangency.
A secant is a line that intersects the cirlce in two points.

3. Practice
Tangent
diameter
Secant
radius
Chord

4. Practice F Name 5 radii A Name 3 chords E Name 2 diameters
Name 1 secant
Name 1 tangent
Name the point of tangency A E O D B C

5. Polygons and Circles
When a polygons sides are the chords of the circle, then the polygon is an inscribed polygon.

6. Polygons and Circles
When a polygons sides are tangent to the circle, then the polygon is a circumscribed polygon.

7. Determine if the polygons are inscribed or circumscribed.

8. Arcs and Angles An arc is a part of the circle.
A central angle of a circle is coplanar iwth the circle. Its vertex is the center of the circle.
A minor arc is the smaller arc of the circle.
A major arc is the larger arc of the circle.
A semicircle is equal to the half of a circle.
Cocentric circles are coplanar circles that share the same center
Inscribed angles are angles that has its vertex on the circle and whose sides contains chords of the circle.

9. Practice E Name 3 major arc Name 3 minor arc Name 3 central angles A
Name 3 inscribed angles
Name 2 semicircles A D O B C