jackellyn
  • jackellyn
Explain why the following is true: If C is the center of the circle, triangle BCD is an equilateral triangle.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Vocaloid
  • Vocaloid
well, assuming that the triangle BCD is inscribed in the circle like so: |dw:1436400969882:dw|
Vocaloid
  • Vocaloid
|dw:1436401004361:dw|
jackellyn
  • jackellyn
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Vocaloid
  • Vocaloid
|dw:1436401334084:dw|
Vocaloid
  • Vocaloid
(bad drawing, apologies) EC and AD intersect, giving us the vertical angle 60 on both sides
jackellyn
  • jackellyn
Yeah that's what I have so far. I just need to find a way to say the angle CBD and angle CDB are 60 degrees too
Vocaloid
  • Vocaloid
split the 60 degree angle on the right side into 30 and 30
Vocaloid
  • Vocaloid
|dw:1436401484203:dw|
Vocaloid
  • Vocaloid
giving us |dw:1436401524183:dw|
Vocaloid
  • Vocaloid
basically, what I did was draw a straight line down from D to C, resulting in two right triangles, each with an angle of 30 and 90, and the remaining angle is 60 because 30+60+90 = 180 hopefully that wasn't too confusing to understand D:
jackellyn
  • jackellyn
It wasn't thanks!

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