MATH

<img src=www.connexus.com/content/media/680582-5242012-24223-PM-203654216.png" alt="A circle is bisected by a horizontal line in the center labeled DE. Point C is in the center of the line. A line extends up to point F to form triangle CFD. From point E, a line extends diagonally down to the left to point A. Another line extends from point A diagonally down to the right to point B."/>

1.which of the following is a radius of the circle
a.DE
b.AB
C.CE
2.which of the following is a diameter of the circle
a.ED
b.EC
c.BA
3.which of the following is a chord, but not a diameter, of the circle
a.CE
b.FD
c.DE
4.what is the correct way to name a semicircle of the circle
a.ABE
b.DAB
c.EFD
5.what arc is less than a semicircle
a.DE
b.EAB
c.AE
6.if DE=6 cm, what deos CE equal
a.3 cm
b.6 cm
c.12 cm
7.if CF=10 in, what deos ED equal
a.5 in
b.10 in
c.20 in
8.which angle is a central angle of the circle
a.DCF
b.AED
c.BAE
use the circle to answer the questions accept number 8

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  1. my answers are
    1.a
    2.a
    3.c
    4.c
    5.a
    6.b
    7.b
    8.c

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  2. #1. No, DE is the diameter
    #2. ok. So why did you give that same answer to #1?
    For the rest, I am assuming that F,A,B are all points on the circle.
    #3. Huh? See #2
    #4. ok
    #5. No. See #2. I think EBA, but it's hard to say, not having access to the picture.
    #6. Huh? See #1, #2
    #7. AGAIN? If F is directly above C, then CF is a radius. So, DE (remember DE?) is a diameter, so twice as long
    #8. No. The vertex of a central angle is (duh!) the CENTER of the circle: C
    #6.

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    posted by oobleck

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