anonymous
  • anonymous
Derek determines that triangle CGD is an isosceles triangle. Which statement best describes Derek’s conclusion? It is correct because angle CGD = 108°, angle GCD = 36°, and angle GDC = 36°. It is correct because angle CGD = 72°, angle GCD = 72°, and angle GDC = 36°. It is incorrect because angle CGD = 72°, angle GCD = 74°, and angle GDC = 34°. It is incorrect because angle CGD = 108°, angle GCD = 54°, and angle GDC = 18°
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
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anonymous
  • anonymous
@ganeshie8
ganeshie8
  • ganeshie8
start wid finding all angles in the triangle CGD

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anonymous
  • anonymous
@ganeshie8
ganeshie8
  • ganeshie8
find the angles
anonymous
  • anonymous
Erm, how exactly do I do that?
ganeshie8
  • ganeshie8
G = 108, cuz vertical angles are equal
ganeshie8
  • ganeshie8
C = 90-36 = 54
ganeshie8
  • ganeshie8
Find D using triangle sum property
anonymous
  • anonymous
is it 18 ?
ganeshie8
  • ganeshie8
yes ! so all different angles we got eh ?
ganeshie8
  • ganeshie8
108 54 18
anonymous
  • anonymous
So the last choice?
ganeshie8
  • ganeshie8
Yes ! its not an isosceles triangle at all
anonymous
  • anonymous
Thank you!
ganeshie8
  • ganeshie8
np :)

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