4.1 Introduction To Circles

4.1 Introduction to Circles epithet: ________________________
Math 2Date: ________________________

touchstone:
Essential Question:

Definition: A overlap is the go by of all trains in a unwavering at a given distance from a given point.
A. A good deal is named by its center. The circle shown below has center C so it is called circle C. This is symbolized by writing [pic]C.

B. Draw a epithelial duct component by connecting points C and D in the circle above. The segment you puzzle drawn is called a rung. The plural of radius is radii. Name three an new(prenominal)(prenominal) radii of the circle. Be sure to using up the correct notation for a berth segment: ______ , ______ , ______
invoice: one endpoint of the radius is the center of the circle and the other endpoint is a point on the circle.
Also, all radii of a circle are congruent. So, if AC = 2 cm, then CE = _____ cm.

C. Now, make another segment by connecting points A and E. The segment you relieve oneself drawn is called a chord. Name five other chords of the circle. ______ , ______ , ______ , ______ , ______
Note: both endpoints of a chord are points on the circle. Chords of a circle do not necessarily have the same length.

D. If a chord passes through the center of a circle it is given a special name. It is called a diameter. Name the diameter pictured in [pic]C.



_________ Now, draw that diameter.

Note: a diameter is the longest chord of a circle. Its length is doubly that of the radius. So, if AC = 2 cm, then AB = _____ cm.

E. Next, draw a line passing through points B and F. The line you have drawn is called a tangent. A tangent lies in the plane of the circle and intersects the circle in only one point. The point of intersection is called the point of tangency. What is the point of tangency for [pic]? ________

F. Now, draw the line passing through points A and F. This line is called a secant. any line that contains a chord of a circle is called a secant.

Use the circle below to identify the...If you want to besot a full essay, order it on our website: Ordercustompaper.com



If you want to get a full essay, wisit our page: write my paper