It may delete a post erroneously. If your post is missing and you're sure it's not a rule-breaker, send us a note and we'll look into the issue. We ban all bots. Embarrassed engineer dad here, trying to help daughter with some algebra. Ran into this problem which, to me, appears to have incomplete information. She was trying to solve it assuming that EF and ED are the same length and therefore everything can just be split in half and solved easily.
But I redrew it to show that she could have the same angles given but have a very lopsided drawing as well. I have a feeling we want to extend ED and EF out to that tangent line, but I tried that and just end up with more unknown angles. I'm going to take a stab at it. See if you can follow my logic, and tell me if this is sound to you: Imagine a line CE. Of course if this figure isn't symmetrical, then there isn't enough information to solve this.
Since this is high school geometry I think it's safe to assume that it is. If you could prove that, then the bisecting strategy would work. This is an interesting question, I feel like there is a possible solution with the given info but it's certainly not obvious. I tried extending the line segments CD and CF out to the tangent line, but as you said, it just gives you more unknown angles. Sorry man, I have no idea. The problem with this is you need to prove it's symmetry.
It's been a while since I have done formal geometry, so I don't remember if this is something that can be assumed. Yup, that's definitely an issue. If it wasn't symmetrical, then there is definitely not enough information to solve this.
But because it's high school geometry, I think it's a safe assumption that it is. I doubt they would be asking a high schooler to prove symmetry in this case. Yes, if he could prove that the angles DCA and ACF were equal to each other, then the bisecting strategy would definitely work. I'm thinking about how to do that but can't figure it out.
That's the problem, they don't have to be symmetrical I'm assuming C is the center of the circumference here. What are some of the theorems they are currently working with. I don't want to be trying to use arcs and inscribed angles if they haven't gotten there yet. The rest of the assignment uses only: I found this page which does seem to somehow prove that if the angle at the center is double the angle where the chords meet, then the chords must be equal length:.
But they start with 2 tangents that meet at a given angle and work back from there. I can't quite make the connection to my problem though. And that example seems to have more information to start. I think this will be your jumping off point. I'm going to start on it now, but I figured I would share the info as I found it. I'm assuming that ED and EF are equal in magnitude as you described already. Also, I'm focusing on the triangle CEF.
Therefore, using the fact that a straight line is degrees, angle ECF is degrees. Well since this isn't high-level math, there is no reason we can't assume what is obvious in the design of the question. Since there is no other way to do it without more information, we can assume it is the only way. The entire point of formal geometry a sophomore level class, often taken by freshman is to being with the question and the answer and prove the answer.
Using your "since this isn't high-level math" argument we could just say bust out a protractor and measure the angle. What you are missing is the entire point of the question, which is to prove that the figure is symmetrical first. Because if it's not symmetrical, then your entire argument is wrong. But we can't assume that any of the congruent base angles of any one triangle are congruent to the base angles of any other triangle. Two of the triangles that share C as a vertex have top angles that sum to But we don't know the size of each.
Again, we don't know the size of each. I can't figure out ANY way to use the tangent line at A. I looked at that tangent line for a long time and it is totally useless. You could draw it further to the left or right and none of the given information would change. Be aware whenever you use the Internet. If you have any questions about Internet safety, ask your parents or a teacher, or visit the findingDulcinea Internet Security Web Guide.
Register for free to use the tools. SparkNotes has an in-depth review of how to write a proof with examples and definitions. The Web site also has an SAT test prep section with essential concepts and strategies, common mistakes and five practice sets. For geometry homework help and review …. ThinkQuest Library has explanations of geometry concepts and quizzes to test your knowledge. Free Math Help has text and Flash video lessons that cover all aspects of geometry and some trigonometry, too.
Ask a question on the geometry message board. Ready for a study break? For geometry test prep ….
Find the exact Geometry tutoring and homework help you need by browsing the concepts below, searching by keyword, or searching by your textbook and page number. Each of our online Geometry lessons includes highly targeted instruction and practice problems so that you can QUICKLY learn the concept. “My daughter was a struggling high school.
Find high school geometry homework help. Our guide lists a number of sites that provide great high school geometry homework help.
Master the topics in your high school geometry class with this interactive homework help course. Our entertaining yet informative lessons cover all. Homework help high school geometry, - Pay someone cheap to write paper for you. Every time you visit our site and ask us to write my essays, we are more than happy to help you with that and assist during the whole process.
High school geometry homework help, - Homework helps students. No plagiarism — exclusive writing in approximately subjects. Do my geometry homework How often have you asked your parents or friends ‘can you help me with geometry?’ It is a very difficult subject, which requires complex approach and attention to details, so it is not surprising that students find geometry so difficult.