+0  
 
0
100
1
avatar

Ello, I need a little assistance here. See, Geo (Geometry) is not my thing but it is a mandatory class, so I have to get through it. However, in the process of doing so, I would like to at least try to grasp as much of it as I can. I'm just struggling with a few problems (5 tops), though, so if you could help me out, then thanks! I really appreciate it. :) 

 

1. AD is tangent to circle B at point C. What is the measure of <BAC?

Options: 40, 50, 90, or 180 dg

2. BC is tangent to circle D at point C. The measure of <BDC is 35dg. What is the measure of <DBC?

Options: 35, 55, 90, or 180 dg

3. What is the value of n? 

4. What is the value of n?

5. Which statement about BC is correct?

Options: BC is a tangent line because m<ABC is acute

              BC is not a tangent line because m<ABC =/90dg

              BC is a tangent line because the sum of the angles in triangle ABC is 180dg

              BC is a tangent line because triangle ABC is a right angle

Guest Mar 9, 2017
Sort: 

1+0 Answers

 #1
avatar+76821 
0

1. Don't know how to solve this.......maybe someone else knows....

 

2. m<DBC =m<DCB - m<BDC  =  90 - 35   = 55

 

3.  We can use the fact that the procucts of chord segments in a circle are equal....so

4 * 6  = 3 * n

24 = 3n   divide both sides by 3

8 = n

 

4. Based on my answer to 3......can you do this one???....if,not....let me know....

 

5. BC is not a tangent line because m<ABC  less than  90dg

 

To see this....note that the other two angles of triangle ABC =    48 + 47  =  95

 

So  m<ABC  =   180  - 95   =  85.....and remember, if BC is tangent, then m<ABC  must = 90

 

 

cool cool cool

CPhill  Mar 9, 2017

27 Online Users

avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details