anonymous
  • anonymous
I need Geometry help with circles and tangents and intersecting lines. http://i79.photobucket.com/albums/j123/MistyBlue2010/05-24-2011031019PM.jpg
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Owlfred
  • Owlfred
Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!
anonymous
  • anonymous
What do you need help understanding?
anonymous
  • anonymous
For question 6 I don't understand how to find the perimeter

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anonymous
  • anonymous
Where do you need help on this topic?
anonymous
  • anonymous
I am actually going to need help with all of the questions but maybe it will start to make more sense as we go
dumbcow
  • dumbcow
perimeter is sum of the sides when 2 lines coming from point outside circle both are tangent to circle, then 2 lines are of equal length ex: 2 lines coming from A are both length 2 2 lines coming from B both length 5 2 lines coming from C are both 3
anonymous
  • anonymous
oooh I thought that whole side was 5
dumbcow
  • dumbcow
yeah they could have labeled it better
anonymous
  • anonymous
Question 6, I believe the perimeter to be 20. Here is how... The measurements given are from the tangent to the vertex of the triangle Two tangents from a point outside of the circle are equal. Therefore AB = 7 AC = 5 and BC = 8 Now just add
anonymous
  • anonymous
Okay so for question 7 do I use
anonymous
  • anonymous
a2+b2=c2?
dumbcow
  • dumbcow
gian better explanation than mine :)
anonymous
  • anonymous
Use Pythagoras
anonymous
  • anonymous
9 is 90 degrees right?
anonymous
  • anonymous
OK here's how... Call radius r So root 28 squared minus root 5 squared is equal to r squared. Therefore 28 - 25 = 3 = r squared. taking square roots r = root 3
anonymous
  • anonymous
thanks :) that is what I got
anonymous
  • anonymous
No problem
dumbcow
  • dumbcow
yes 9 is 90 degrees
anonymous
  • anonymous
I am stuck on number 10 though...
anonymous
  • anonymous
OH never mind I read the question wrong
anonymous
  • anonymous
ED is half of CD
anonymous
  • anonymous
For question 12 how would I find x? Do I assume that x is half of 9?
anonymous
  • anonymous
Also for question 13 how would I find y?
anonymous
  • anonymous
You do not have to assume, those line hatches on the chord tell you it is broken in two halves.

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