Tuesday

January 27, 2015

January 27, 2015

Posted by **Aaron** on Wednesday, June 3, 2009 at 8:49pm.

Angle D equals 40 degrees. Angle DEO equals 90 degrees. Angle FOE equals 50 degrees.

What is arc measure EF?

- Geometry -
**Reiny**, Wednesday, June 3, 2009 at 9:47pmDon't know about anybody else, but I find the description of your diagram very confusing.

"I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side."

Is E the contact point?

Are F and C on the circle?

"Angle D equals 40 degrees"

What are the arms of angle D?

Is D the intersection of line FC extended?

Finally you ask for the measure of the arc EF, but you give only angles and no measure of any sides.

the arc length will be a function of the radius of the circle, and since we have no lengths given at all .... ?????

- Geometry -
**Aaron**, Wednesday, June 3, 2009 at 10:00pmE is the contact point.

F and C are on the circle and 180 degrees from each other.

Angle D is EDF.

finally, I need the angle measure of Arc EF

- Geometry -
**Reiny**, Wednesday, June 3, 2009 at 10:08pmyou said "finally, I need the angle measure of Arc EF "

I assume you meant the central angle subtended by arc EF ?

But didn't you say that angle FOE = 50º ?

- Geometry -
**Aaron**, Wednesday, June 3, 2009 at 10:16pmoh...

wow, thx.

**Answer this Question**

**Related Questions**

Geometry - I have a circle with a Tangent line, DE, running along it and ...

GEOMETRY INSCRIBED ANGLES MULTIPLE CHOICE QUESTION - segment BC is tangent to ...

Math - I have a question my brother asked me but I need a math expert. You have ...

calc - standard equation of circle concentric with X^2+Y^2-2X-8Y+1=0 and tangent...

Geometry Multiple Choice Question Please Help! - Find the value of x. If ...

GEOMETRY INSCRIBED ANGLES MULTIPLE CHOICE QUESTION - Find the value of x. If ...

Geometry - Within an orthonormal system consider points A(1,4) B(5,1) C(4,8) (a)...

math - a circle is tangent to the y-axis at y=3 and has one x-intercept at x=1 a...

Geometry - Prove that the tangents to a circle at the endpoints of a diameter ...

Math (Pre Cal) - Hi, I am studying for a precalculus quiz and I do not ...