anonymous
  • anonymous
Given: line BD is a diameter m angle 1 = 100° m semi circle BC = 30° m semi circle AC= a. 60 b. 110 c. 200
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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hartnn
  • hartnn
have you tried this ? which step are you stuck ?
anonymous
  • anonymous
All of the steps haha

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hartnn
  • hartnn
do you know that measure of central angle equals measure of arc. |dw:1360890234039:dw|
anonymous
  • anonymous
Yes I knew that.
hartnn
  • hartnn
now , measure of semicircle =180 you knew this ? |dw:1360890434105:dw|
anonymous
  • anonymous
I know that I also know that a whole circle equals 360 degrees.
anonymous
  • anonymous
I just need to know how to find out AC
hartnn
  • hartnn
okkk, AC = AB+BC = angle 2+ angle 3, right ?
anonymous
  • anonymous
Yupp.
anonymous
  • anonymous
The answer is 110! Thank youu (:
hartnn
  • hartnn
and since BC =30, you know angle 3=30 ... oh, you got it ! good :)

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