aldas7
aldas7 aldas7
  • 11-11-2019
  • Mathematics
contestada

AB=AC
please help with this problem ​

ABACplease help with this problem class=

Respuesta :

marcthemathtutor
marcthemathtutor marcthemathtutor
  • 11-11-2019

Answer:

30°

Step-by-step explanation:

∠CKB = 180 - 110 = 70°

∠KBC = 180° - ∠CKB - ∠KCB

∠KBC = 180° - 70° - 40°

∠KBC = 70° = ∠ABC

given AB = AC (isosceles triangle)

hence ∠ACB = ∠ABC = 70° (base angles of an isosceles triangle)

therefore,

∠ACK = ∠ACB - ∠KCB

∠ACK = 70 - 40 = 30°

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